Upgrade from 2.x to 2.y

Please apply general caution as you would with any software: have backups and a rollback plan ready!

Known issues

Known regressions in the latest released version

No known issues.


RPM packaging

RPM packages have been reorganized to match the Debian packages naming convention. The upgrade via yum or dnf should work smoothly.

For EL8 and EL9, you must update the GPG key:

curl https://lemonldap-ng.org/security/GPG-KEY-LLNG-SECURITY.asc > /etc/pki/rpm-gpg/RPM-GPG-KEY-OW2

Like Debian, jobs are now managed through systemd timers: ` systemd edit lemonldap-ng-portal.timer systemd edit lemonldap-ng-handler.timer `

Portal templates changes

You can skip this entire section if you use the default bootstrap theme or if your custom theme only uses custom*.tpl templates.

TOTP registration

The TOTP registration now offers a otpauth:// url that can automatically open your TOTP application when viewed on mobile. Apply the following patch to totp2fregister.tpl to use this new feature:

diff --git a/lemonldap-ng-portal/site/templates/bootstrap/totp2fregister.tpl b/lemonldap-ng-portal/site/templates/bootstrap/totp2fregister.tpl
index 506a83481..a14e61d31 100644
--- a/lemonldap-ng-portal/site/templates/bootstrap/totp2fregister.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/totp2fregister.tpl
@@ -11,8 +11,8 @@
         <div class="col-md-6 text-center">
           <div >
             <p>&#x2460; <span trspan="totpQrCode"></span></p>
-            <canvas id="qr"></canvas>
+            <p><a class="otpauth-url" href=""><canvas id="qr"></canvas></a></p>
+            <p><span trspan="totpOrTouch"></span></p>
             <p><span trspan="totpSecretKey"></span></p>
             <tt id="secret"></tt>

Second factor retry

It is recommended to apply the following patch to your custom templates so that users will have a more friendly error message when retrying their 2FA:

diff --git a/lemonldap-ng-portal/site/templates/bootstrap/ext2fcheck.tpl b/lemonldap-ng-portal/site/templates/bootstrap/ext2fcheck.tpl
index 4f277f295..c0381fc9e 100644
--- a/lemonldap-ng-portal/site/templates/bootstrap/ext2fcheck.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/ext2fcheck.tpl
@@ -2,7 +2,11 @@

 <main id="logincontent" class="container">

+  <div class="message message-<TMPL_VAR NAME="AUTH_ERROR_TYPE"> alert" role="<TMPL_VAR NAME="AUTH_ERROR_ROLE">"><span trmsg="<TMPL_VAR NAME="AUTH_ERROR">"></span></div>
 <div class="message message-positive alert"><span trspan="<TMPL_IF "LEGEND"><TMPL_VAR "LEGEND"><TMPL_ELSE>enterExt2fCode</TMPL_IF>"></span></div>

 <div class="card">

diff --git a/lemonldap-ng-portal/site/templates/bootstrap/password2fcheck.tpl b/lemonldap-ng-portal/site/templates/bootstrap/password2fcheck.tpl
index 098d91345..361365ef6 100644
--- a/lemonldap-ng-portal/site/templates/bootstrap/password2fcheck.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/password2fcheck.tpl
@@ -2,7 +2,11 @@

 <main id="logincontent" class="container">

+  <div class="message message-<TMPL_VAR NAME="AUTH_ERROR_TYPE"> alert" role="<TMPL_VAR NAME="AUTH_ERROR_ROLE">"><span trmsg="<TMPL_VAR NAME="AUTH_ERROR">"></span></div>
 <div class="message message-positive alert"><span trspan="enterPassword">Enter your password</span></div>

 <div class="card">

diff --git a/lemonldap-ng-portal/site/templates/bootstrap/totp2fcheck.tpl b/lemonldap-ng-portal/site/templates/bootstrap/totp2fcheck.tpl
index 427f78f6c..8e84497e6 100644
--- a/lemonldap-ng-portal/site/templates/bootstrap/totp2fcheck.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/totp2fcheck.tpl
@@ -2,7 +2,11 @@

 <main id="logincontent" class="container">

+  <div class="message message-<TMPL_VAR NAME="AUTH_ERROR_TYPE"> alert" role="<TMPL_VAR NAME="AUTH_ERROR_ROLE">"><span trmsg="<TMPL_VAR NAME="AUTH_ERROR">"></span></div>
 <div class="message message-positive alert"><span trspan="enterTotpCode"></span></div>

 <div class="card">

diff --git a/lemonldap-ng-portal/site/templates/bootstrap/webauthn2fcheck.tpl b/lemonldap-ng-portal/site/templates/bootstrap/webauthn2fcheck.tpl
index 881625d5f..aad8d4886 100644
--- a/lemonldap-ng-portal/site/templates/bootstrap/webauthn2fcheck.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/webauthn2fcheck.tpl
@@ -3,7 +3,7 @@
 <div class="container">

-  <div class="message message-<TMPL_VAR NAME="AUTH_ERROR_TYPE"> alert"><span trmsg="<TMPL_VAR NAME="AUTH_ERROR">"></span></div>
+  <div class="message message-<TMPL_VAR NAME="AUTH_ERROR_TYPE"> alert" role="<TMPL_VAR NAME="AUTH_ERROR_ROLE">"><span trmsg="<TMPL_VAR NAME="AUTH_ERROR">"></span></div>
   <div id="color" class="message message-positive alert"><span id="msg" trspan="webAuthnRequired"></span></div>


PKCE is enforced for all OIDC clients supporting it

In versions before 2.18.2, PKCE was not verified doing the token request of an OIDC flow unless the “Require PKCE” option was set explicitly in the LemonLDAP::NG configuration for this RP.

Starting from now, PKCE will be verified anytime a RP enabled it by specifying the code_challenge parameter during the authorization request.

RPs that do not support PKCE will not send the code_challenge parameter, and therefore will not be affected by this change.


“Stay connected” has changed name

The “Stay connected on this device” feature has been refactored into a more generic Trusted browser plugin feature. The name of the configuration section has changed in the manager but no particular actions are required for existing installations.

Change in second factor UI

After registering a new second factor of type Webauthn, TOTP, U2F or Generic, the user is now brought back to the main 2FA Management screen. You can cancel this behavior by calling preventDefault in your JS handler:

$(document).on( "mfaAdded", { }, function( event, info ) {

See Available JQuery Events for more information

Apache2 handler now uses IP from mod_remoteip

If you use mod_remoteip in your handlers, LemonLDAP::NG will now correctly use the IP from mod_remoteip in $env->{REMOTE_ADDR}.

OpenID Connect issuer now implements acr_values

The acr_values from OpenID Connect authorization requests can now be used to increase the authentication level required for accessing a service. If after upgrading you start noticing that users are now asked to upgrade their session when trying to access OIDC applications, you should check the acr_values requested by you application, and map them to the desired authentication level in OpenID Connect Service » Authentication context

Cron files moved to systemd timers on Debian

On Debian, LemonLDAP::NG now uses systemd timers for maintenance tasks instead of cron.d scripts.

If you need to modify the frequency of execution of your maintenance tasks, you should use a systemd override:

` systemd edit liblemonldap-ng-portal-perl.timer systemd edit liblemonldap-ng-handler-perl.timer `

` [Timer] OnCalendar=*-*-* *:07:07 `

Encryption of password in session

If you store the password in session because you need to replay it on a protected application (Auth Basic or form replay), you should now enable password encryption in session (this option is disabled by default).

This requires to decrypt the $_password` value before sending it to the application, with the decrypt() method.

Safe Jail

For security reason, we now enforce Safe Jail by default in lemonldap-ng.ini, so an administrator with only access to Manager cannot disable it. If you want to improve security, update your lemonldap-ng.ini. To retrieve the old behavior (Safe Jail configuration through Manager), just let the option commented in lemonldap-ng.ini.

Portal templates changes

You can skip this entire section if you use the default bootstrap theme or if your custom theme only uses custom*.tpl templates.

Password policy display

It is recommended to replace your custom theme’s passwordpolicy.tpl by the one that is provided in the bootstrap theme.

If you use the Have I Been Pwned plugin, this is a required change because the modifications in 2.18 will break this particular plugin.

If you are using the default templates from the bootstrap theme, you don’t need to change anything.

Email templates

To avoid email sent by LL::NG being flagged as spam, we remove inline images in HTML content. You can add them back by customising the email templates and eithier use inline images (cid) or links to external resources.

Note that we now send a plain text version of the mail attached to the HTML email.


Restriction in use of OIDC request_uri

A little-know feature of OIDC (note: you are probably not using it) allows the OpenID Provider, LemonLDAP::NG in this case, to fetch the Authorization request parameters itself by indicating a request_uri parameter.

By default, we now disallow this feature, and require LemonLDAP::NG admins to explicitly allow Request URIs in the configuration (OpenID Connect Relying Parties » Your RP » Options » Security » Allowed URLs for fetching Request Object). This setting allows wildcards such as http://rp.example.com/*.


Possible regression in unicode character handling for UWSGI users

We fixed an issue that made UWSGI behavior inconsistent with other deployment methods (FastCGI, ApacheMP2). As a consequence, you might notice a change in the way non-ASCII characters are displayed by LemonLDAP::NG.

If you used workarounds to make non-ASCII characters work in UWSGI, you can remove them in this new release.

If you instead wish to restore previous behavior, you can also set the following configuration in /etc/uwsgi/apps-available/llng-server.yaml :

        # ...

However, restoring previous behavior is not recommended, as you are likely to run into even more encoding bugs in the long run.

Portal templates changes

You can skip this entire section if you use the default bootstrap theme or if your custom theme only uses custom*.tpl templates.

Font Awesome application icons

It is now possible to use Font Awesome icons in the application menu.

If you modified the default menu.tpl template, you need to update it:

--- a/lemonldap-ng-portal/site/templates/bootstrap/menu.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/menu.tpl
@@ -146,9 +146,13 @@
                         <!-- Logo (optional) -->
                         <TMPL_IF NAME="applogo">
                           <div class="col-3">
+                          <TMPL_IF NAME="applogo_icon">
+                          <span class="applogo fa-3x fa fa-<TMPL_VAR NAME="applogo"> <TMPL_VAR NAME="appid">"></span>
+                          <TMPL_ELSE>
                           <img src="<TMPL_VAR NAME="STATIC_PREFIX">common/apps/<TMPL_VAR NAME="applogo">"
                             class="applogo <TMPL_VAR NAME="appid"> img-fluid"
                             alt="" />
+                          </TMPL_IF>
                           <div class="col-9">

If you are using the default templates from the bootstrap theme, you don’t need to change anything.

Password policy

It is recommended to update your theme’s passwordpolicy.tpl to correctly display special characters in password policies

--- a/lemonldap-ng-portal/site/templates/bootstrap/passwordpolicy.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/passwordpolicy.tpl
@@ -34,7 +34,7 @@
         <i id="ppolicy-allowedspechar-feedback" class="fa fa-li"> </i>
-        <span trspan="passwordPolicySpecialChar">Allowed special characters:</span> <TMPL_VAR NAME="PPOLICY_ALLOWEDSPECHAR">
+        <span trspan="passwordPolicySpecialChar">Allowed special characters:</span> <TMPL_VAR NAME="PPOLICY_ALLOWEDSPECHAR" ESCAPE="html">

If you are using the default templates from the bootstrap theme, you don’t need to change anything.


AuthBasic now enforces 2FA activation

In previous versions of LemonLDAP::NG, a 2FA protected account didn’t need to use their second factor when authenticating to an AuthBasic handler.

If you are absolutely sure that you want 2FA protected accounts to access AuthBasic handlers, which are password only, you can add the following test in your 2FA activation rules

and not $ENV{AuthBasic}



Behaviour change in 2FA registration to avoid adding device without testing current authentication level. (see issue 2803) User must log in by using its higher available 2FA to register a new one.

Change in error messages

The error messages for the following situations have been changed:


Translation code (lemonldap-ng.ini)

Translation code (lang.json)

New error message

An authentication request has been made to an unknown CAS application



This application is not known

An authentication request has been made to an unknown SAML service provider



This application is not known

An authentication request has been made to an unknown OIDC relying party



This application is not known

User was not allowed to access a CAS application



You’re not authorized to access to this host

An unauthorized logout URL was specified during logout from a CAS application



Unauthorized URL

An unauthorized Redirect URI was used during an OIDC login



Unauthorized URL

The provided url= parameter does not correspond to a protected URL



Not a protected or trusted URL

Users who wish to adjust error messages in these situations should update their translation files

Improve the use of multiple 2FA types

Changes in custom 2F::Register:: modules

  • Users who use their own Lemonldap::NG::Portal::2F::Register:: modules must now inherit from Lemonldap::NG::Portal::2F::Register::Base

  • The canUpdateSfa function has been moved into the 2FA Engine and should not be called by your registration module anymore

Changes in templates

The default skin.min.js file has been updated in this release, be sure to copy skin.min.js from bootstrap into your custom theme.

Due to some internal changes in the way registrable second factors are handled, it is recommended to update your custom 2fregisters.tpl

@@ -32,7 +32,14 @@
             <td class="data-epoch"><TMPL_VAR NAME="epoch"></td>
               <TMPL_IF NAME="delAllowed">
-                <span device='<TMPL_VAR NAME="type">' epoch='<TMPL_VAR NAME="epoch">' class="btn btn-danger" role="button" data-toggle="modal" data-target="#remove2fModal">
+                <span
+                    device='<TMPL_VAR NAME="type">'
+                    epoch='<TMPL_VAR NAME="epoch">'
+                    prefix='<TMPL_VAR NAME="prefix">'
+                    class="btn btn-danger"
+                    role="button"
+                    data-toggle="modal"
+                    data-target="#remove2fModal">
                   <span class="fa fa-minus-circle"></span>
                   <span trspan="unregister">Unregister</span>

To fix behavior of checkbox “generate my password” in password reset screen, update your custom mail.tpl (see commit)

To have the new tooltip feature on IDP choice screen, update your custom idpchoice.tpl (see commit)

For the message box in menu when no applications are allowed, update your custom menu.tpl (see commit)

For the new password policy balcklist feature, update your custom passwordpolicy.tpl (see commit)

New template files that should be linked or copied in your custom theme:

  • generic2fregister.tpl

  • password2fcheck.tpl

  • password2fregister.tpl

If you are using the default templates from the bootstrap theme, you don’t need to change anything.

For plugin developpers

Change in passwordAfterChange hook behavior

If you wrote a custom plugin using the passwordAfterChange hook, return codes other than PE_OK will now be displayed by the portal, instead of being ignored.

Change in modifyPassword method

The modifyPassword method now takes a hash of arguments to specify extra behavior


# Method definition
sub modifyPassword {
     my ( $self, $req, $pwd, $useMail ) = @_;

# Method call
$self->p->_passwordDB->modifyPassword($req, $pwd, $useMail);


# Method definition
sub modifyPassword {
    my ( $self, $req, $pwd, %args ) = @_;
    my $useMail = $args{useMail};

# Method call
$self->p->_passwordDB->modifyPassword($req, $pwd, useMail => $useMail);


Translation overrides in lemonldap-ng.ini now take priority over skin

Previously, the presence of a translation JSON file within a skin prevented translation messages defined in lemonldap-ng.ini from being used.

Additionally, it was not possible to translate strings in email templates using a custom skin file.

These two bugs are now fixed, be sure to check that you do not have duplicate translations in lemonldap-ng.ini and in your skin files (*.json). If you do, the translation in lemonldap-ng.ini will now take priority.

See documentation on translating messages for details

New Captcha API

It is now possible to create your own Captcha modules to replace the one provided by default.

In order for custom Captcha modules to work, you need to modify your custom standardform.tpl, mail.tpl and register.tpl template files:

-    <TMPL_INCLUDE NAME="captcha.tpl">

If you are using the default templates from the bootstrap theme, you don’t need to change anything.

Re-send 2FA code

The mail, external and REST based 2FA types can now re-send the user code if delivery failed for some reason. If you use custom templates, you must update ext2fcheck.tpl

--- a/lemonldap-ng-portal/site/templates/bootstrap/ext2fcheck.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/ext2fcheck.tpl
@@ -26,6 +26,12 @@
   <div class="buttons">
+    <button type="submit" class="btn btn-primary" formaction="<TMPL_VAR "RESENDTARGET">">
+      <span class="fa fa-repeat"></span>
+      <span trspan="resendCode">Re-send code</span>
+    </button>
+    </TMPL_IF>
     <a href="<TMPL_VAR NAME="PORTAL_URL">?cancel=1&skin=<TMPL_VAR NAME="SKIN">" class="btn btn-primary" role="button">
       <span class="fa fa-home"></span>
       <span trspan="cancel">Cancel</span>

If you are using the default templates from the bootstrap theme, you don’t need to change anything.

Customizing the 2FA logo in the registration screen

The 2FA registration screen now displays the custom logo and label set in configuration. If you use custom templates, you should update 2fregisters.tpl

@@ -77,10 +77,16 @@
         <div class="card border-secondary">
           <div class="card-body py-3">
           <a href="<TMPL_VAR NAME="URL">" class="nodecor">
-      <div class="card-footer text-white text-uppercase bg-secondary"><TMPL_VAR NAME="CODE">2F</div>
+      <div class="card-footer text-white text-uppercase bg-secondary">
+      <TMPL_IF LABEL>
+        <p><TMPL_VAR NAME="LABEL"></p>
+      <TMPL_ELSE>
+        <p trspan="<TMPL_VAR NAME="CODE">2f"></p>
+      </TMPL_IF>
+      </div>

If you are using the default templates from the bootstrap theme, you don’t need to change anything.

Remember authentication choice

A new plugin can be enabled to display a checkbox in authentication choice module to allow users remembering their choice, which will automatically redirect them to the selected choice the next time they connect to the portal.

If you use custom templates, you should update login.tpl

--- a/lemonldap-ng-portal/site/templates/bootstrap/login.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/login.tpl
@@ -66,6 +66,12 @@

             <TMPL_IF NAME="sslform">
               <TMPL_INCLUDE NAME="sslformChoice.tpl">
+              <!-- Remember my authentication choice for this module -->
+                <input type="hidden" id="rememberauthchoice" name="rememberauthchoice" value="<TMPL_IF NAME="REMEMBERAUTHCHOICEDEFAULTCHECKED">true</TMPL_IF>" />
+              </TMPL_IF>

             <TMPL_IF NAME="gpgform">
@@ -92,6 +98,11 @@


+              <!-- Remember my authentication choice for this module -->
+                <input type="hidden" id="rememberauthchoice" name="rememberauthchoice" value="<TMPL_IF NAME="REMEMBERAUTHCHOICEDEFAULTCHECKED">true</TMPL_IF>" />
+              </TMPL_IF>

@@ -104,6 +115,34 @@

     </div> <!-- end authMenu -->

+    <div class="input-group col-md-6 offset-md-3">
+      <!-- Global checkbox for remembering the authentication choice for all modules -->
+      <div id="globalrememberauthchoicecontainer" class="input-group-prepend input-group">
+        <div class="input-group-text">
+          <input type="checkbox" id="globalrememberauthchoice" name="globalrememberauthchoice" aria-describedby="globalrememberauthchoiceLabel" <TMPL_IF NAME="REMEMBERAUTHCHOICEDEFAULTCHECKED">checked</TMPL_IF> />
+          <input id="rememberCookieName" name="rememberCookieName" type="hidden" value="<TMPL_VAR NAME="REMEMBERAUTHCHOICECOOKIENAME">">
+        </div>
+          <p class="form-control">
+            <label id="globalrememberauthchoiceLabel" for="globalrememberauthchoice" trspan="rememberChoice">Remember my choice</label>
+          </p>
+      </div>
+      <!-- Timer + stop button for triggering the remembered authentication choice -->
+      <div id="remembertimercontainer" class="input-group">
+        <p class="form-control">
+          <span id="remembertimer"><TMPL_VAR NAME="REMEMBERAUTHCHOICETIMER"></span>
+          <label id="rememberTimerLabel" trspan="rememberTimerLabel">s before automatic authentication</label>
+        </p>
+        <input id="rememberStopped" name="rememberStopped" type="hidden" value="">
+        <div class="input-group-append inout-group">
+          <button class="btn btn-danger" id="buttonRememberStopped"><i class="fa fa-stop-circle-o"></i> Stop</button>
+        </div>
+      </div>
+    </div>
+    </TMPL_IF>


Copy also styles.min.css and skin.min.js from bootstrap into your custom theme.

If you are using the default templates from the bootstrap theme, you don’t need to change anything.



  • CVE-2021-40874: RESTServer pwdConfirm always returns true with Combination + Kerberos (see issue 2612)

U2F deprecation in Chrome 98

Chrome 98 removed U2F support by default. You can enable them back temporarily in chrome://flags by setting Enable the U2F Security Key API to Enabled and Enable a permission prompt for the U2F Security Key API to Disabled

LemonLDAP::NG provides a newer alternative: WebAuthn as a second factor, which is compatible with U2F security keys. Please read Migrating existing U2F devices for instructions on how to convert U2F secrets to WebAuthn.

After migration, you will need to disable U2F from the configuration and enable WebAuthn instead, in General Parameters » Second Factors » WebAuthn

Weak encryption used for password-protected SAML keys

Previous versions of LemonLDAP::NG used a weak encryption algorithm to protect SAML keys when a password was set during certificate generation.

Run the following command to check if this is your case:

lemonldap-ng-cli get samlServicePrivateKeySig
lemonldap-ng-cli get samlServicePrivateKeyEnc

If the output of either command starts with BEGIN ENCRYPTED PRIVATE KEY, then it probably means you generated your keys using the vulnerable manager code.

In this case, you can convert your existing keys to a stronger encryption using the following command

# Extract your existing keys. If samlServicePrivateKeyEnc is empty, you can
# skip it entirely
lemonldap-ng-cli get samlServicePrivateKeySig | \
    sed 's/samlServicePrivateKeySig = //' > saml-sig.pem
lemonldap-ng-cli get samlServicePrivateKeyEnc | \
    sed 's/samlServicePrivateKeyEnc = //' > saml-enc.pem

# Re-encrypt the private key, using the same passphrase
openssl pkey -in saml-sig.pem -aes256 -out saml-sig-aes.pem
openssl pkey -in saml-enc.pem -aes256 -out saml-enc-aes.pem

#Or, if you are using OpenSSL 3+
openssl pkey -provider legacy -provider default -in saml-sig.pem \
    -aes256 -out saml-sig-aes.pem
openssl pkey -provider legacy -provider default -in saml-enc.pem \
    -aes256 -out saml-enc-aes.pem

Then, simply reimport your keys

lemonldap-ng-cli set samlServicePrivateKeySig "$(cat saml-sig-aes.pem)"
lemonldap-ng-cli set samlServicePrivateKeyEnc "$(cat saml-enc-aes.pem)"

If is recommended to keep the same password as before, if not, adjust the samlServicePrivateKeySigPwd and samlServicePrivateKeyEncPwd variables as well.

This operation is transparent and does not require any change to your existing SAML configuration or SAML applications

LemonLDAP::NG version is returned by the CheckState plugin

If you use the /checkstate URL to monitor LemonLDAP::NG, you may notice a slight change in the output format:





Depending on your load balancer or monitoring configuration, this can cause false negatives.

This plugin is disabled by default, and you may use a shared secret to hide this information to regular users and bots, please check the Check state plugin documentation for more information.

Empty scopes now rejected in OAuth2.0 grants

Previously, it was possible to be granted an empty scope, or an automatic openid scope when doing OAuth2.0 Password Grant or Client Credentials Grant.

Starting with 2.0.14, empty scopes are no longer allowed (RFC 6749#section-3.3). You need to either add a scope parameter to your request, or define a default scope in your Relying Party’s Scope Rules.

Portal templates changes

If you defined the “Register page URL” or the password “Reset page URL” to an external application, you need to fix the standardform.tpl template by applying the following patch:

diff --git a/lemonldap-ng-portal/site/templates/bootstrap/standardform.tpl b/lemonldap-ng-portal/site/templates/bootstrap/standardform.tpl
index 3a6256e59..d5192f0ce 100644
--- a/lemonldap-ng-portal/site/templates/bootstrap/standardform.tpl
+++ b/lemonldap-ng-portal/site/templates/bootstrap/standardform.tpl
@@ -48,14 +48,14 @@

 <div class="actions">
     <span class="fa fa-info-circle"></span>
     <span trspan="resetPwd">Reset my password</span>

         <span class="fa fa-refresh"></span>
         <span trspan="certificateReset">Reset my certificate</span>
@@ -69,7 +69,7 @@

       <span class="fa fa-plus-circle"></span>
       <span trspan="createAccount">Create an account</span>

Manager API

The service parameter set in a request to create or update a CAS application must now be an array, and no more a string.

Changes impacting plugin developpers

  • If you are using Custom authentication modules, userDB modules or password modules, $portal->loadedPlugins no longer contains a key with the name of your module. You should use $portal->_authentication, $portal->_userDB, or $portal->_passwordDB instead to get your module instance.


Portal templates changes

Some autocomplete attributes have been added to improve accessibility in the following files: checkdevops.tpl, checkuser.tpl, register.tpl, ext2fcheck.tpl, totp2fcheck.tpl, utotp2fcheck.tpl.



  • CVE-2021-35473: Access token lifetime is not verified with OAuth2 Handler (see issue 2549)

  • CVE-2021-35472: Session cache corruption can lead to authorization bypass or spoofing (see issue 2539)

  • 2FA bypass with sfOnlyUpgrade and totp2fDisplayExistingSecret (see issue 2543)

  • Incorrect regexp construction in isTrustedUrl lets attacker steal session on CDA application (see issue 2535)

  • XSS on register form (see issue 2495)

  • Wildcard in virtualhost allows being redirected to untrusted domains (see issue 2477)

Portal templates changes

Email templates

If you customized the HTML email templates, you must update them to use HTML::Template variables (this was changed to fix XSS injections).

In the following files: mail_2fcode.tpl mail_certificateReset.tpl mail_footer.tpl mail_password.tpl mail_register_done.tpl mail_certificateConfirm.tpl mail_confirm.tpl mail_header.tpl mail_register_confirm.tpl

Replace the following variables:

Old syntax

New syntax













Replace all other variables such as $cn by <TMPL_VAR NAME="session_cn" ESCAPE=HTML>.

Login form

To benefit from the new feature allowing to show password on login form, adapt standardform.tpl (see changes)

To disable password store in browser when changing password (this was already possible for login form), adapt password.tpl (see changes)

To fix placeholder display in password field when password store is disabled in browser, adapt password.tpl (see changes)


See also Simplification of TOTP options below.

FindUser, CheckDevOps templates

Some changes have been made to include new plugins (FindUser and CheckDevOps), you need to report them only if you have a custom theme and you want to use these plugins

Client Credential sessions missing expiration time

If you started using Client Credential grants in 2.0.11, you may have encountered issue 2481.

Because of this bug, the created sessions may never be purged by the purgeCentralCache script.

In order to detect these sessions, you can run the following command:

lemonldap-ng-sessions  search --where _session_kind=SSO --select _session_id --select _utime | \
jq -r  '. | map(select(._utime == null)) | map(._session_id) | join ("\n")'

This will output a list of SSO sessions with no expiration time.

Review them manually using

lemonldap-ng-sessions get <session_id>

You can then remove them with

lemonldap-ng-sessions delete <session_id> <session_id> <etc.>

Brute-force protection plugin may cause duplicate persistent sessions

Because of bug #2482 , some users may notice that the persistent session database is filling with duplicate sessions. Some examples include:

  • An uppercase version of the regular persistent session (dwho vs DWHO)

  • An unqualified version (dwho vs dwho@idp.com)

This bug was fixed in 2.0.12, but administrators are advised to clean up their persistent session database to remove any duplicate persistent sessions remaining after the upgrade.

OpenID Connect check session iframe

The OIDC check session iframe is not working, it has been removed from OIDC configuration metadata. It should not impact any installation as this feature was already broken.

Simplification of TOTP options

The following options have been removed from TOTP configuration:

  • Display existing secret (totp2fDisplayExistingSecret)

  • Change existing secret (totp2fUserCanChangeKey)

As a consequence, users who are not using the default bootstrap skin may need to ajust their totp2fregister.tpl template:

  • Move #divToHide from the .col-md-6 div to the .card div

  • Change:

    <pre id="serialized"></pre>
  • to:

    <br/><tt id="secret"></tt>
  • Remove the #changekey button


Portal templates changes

If you created your own skin and modified some template files, you may need to update them. No change is required if you are using the default bootstrap theme.

A new plugin has been introduced, in beta version: FindUser. It requires a modification of login.tpl to include finduser.tpl.



A vulnerability affecting LemonLDAP::NG installations has been found out when ALL following criteria apply:

  • Your handler server uses Nginx

  • Your virtual host configuration contains per-URL skip or unprotect access rule

In this situation, you have to update your LUA configuration file like /etc/nginx/nginx-lua-headers.conf. See also issue 2434.

Other minor security fixes:

  • It is now possible to hide sessions identifier in Manager (parameter displaySessionId). See also issue 2350.

  • Second factor management by end user now requires safer conditions. See also issue 2332, issue 2337 and issue 2338.

Main changes

  • New dependency: IO::Socket::Timeout

  • TOTP check tolerates forward AND backward clock drift (totp2fRange)

  • Avoid assignment in expressions option is disabled by default

  • RHEL/CentOS SELinux users should install the new lemonldap-ng-selinux package to fix an issue with the new default cache directory

  • If you use Mattermost Team Edition with OpenID Connect, you need to set the id claim type to Integer

  • BruteForceProtection plugin now prevents authentication on backend if an account is locked

  • In the Manager API, postLogoutRedirectUri is now returned and consumed as an array

  • We fixed a bug that caused SAML sessions to be created and never deleted, you should check your session databases for sessions that have "_session_kind": "ISAML" but no _utime. You can safely delete SAML sessions with no _utime during the upgrade.

Portal templates changes

If you created your own skin and modified some template files, you may need to update them, see below if they have been modified.

No change is required if you are using the default bootstrap theme.

2FA manager

If you use a custom theme, even if you did not modify 2fregisters.tpl, you need to copy skin.min.js from the htdocs/static/bootstrap/js folder to your custom theme’s js folder.

If you modified 2fregisters.tpl you need to add the remove2f class to the button that triggers second factor removal:

- <span device='<TMPL_VAR NAME="type">' epoch='<TMPL_VAR NAME="epoch">' class="btn btn-danger" role="button">
+ <span device='<TMPL_VAR NAME="type">' epoch='<TMPL_VAR NAME="epoch">' class="btn btn-danger remove2f" role="button">

Or, better yet, integrate the changes in 2fregisters.tpl into your custom theme to benefit from the new 2F removal confirmation dialog


A CSS change has been done in styles.css to avoid checkbox labels overflow. See issue 2301.

The form-check-input class is missing in register.tpl and notifinclude.tpl. See issue 2374.

Password checker

Input id values have been modified in mail.tpl to work with password checker. See issue 2355.

Tables caption

Tables captions have been added in sessionArray.tpl. See issue 2356.

Stay connected

A small change is required in checklogins.tpl for issue 2365.

Other changes needed in 2fchoice.tpl, ext2check.tpl, totp2fcheck.tpl, u2fcheck.tpl and utotp2fcheck.tpl for issue 2366.


The HTML alt attribute has been added on img in all mail_*.tpl. See issue 2422.


  • Bad default value to display OIDC Consents tab has been fixed. The default value is now: $_oidcConsents && $_oidcConsents =~ /\w+/

  • Some user log messages have been modified, check logs documentation (see also #2244)

  • SAML SOAP calls are now using text/xml instead of application/xml as the MIME Content Type, as required by the SOAP standard

  • Incremental lock times values can now be set in BruteForceProtection plugin through Manager. It MUST be a list of comma separated values. Default values are 5, 15, 60, 300, 600

  • This version is not compatible with Mattermost Team Edition

Change in default cache directory

The default config/session cache directory has been moved from /tmp to /var/cache/lemonldap-ng in order to avoid issues with cache purges when using Systemd. This change is only applied to new installations. If your installation is experiencing cache purge issues, you need to manually change your existing localSessionStorageOptions/cache_root parameter from /tmp to /var/cache/lemonldap-ng. Be sure to create this directory on your file system before modifying your configuration.

If you are using SELinux, you also need to run the following commands

semanage fcontext --add -t httpd_cache_t -f a '/var/cache/lemonldap-ng(/.*)?'
restorecon -R /var/cache/lemonldap-ng/

Required changes in NGINX handler rules (CVE-2020-24660)

We discovered a vulnerability that affects LemonLDAP::NG installations when ALL of the following criteria apply:

  • You are using the LemonLDAP::NG Handler to protect applications

  • Your handler server uses Nginx

  • Your virtual host configuration contains per-URL access rules based on regular expressions in addition to the built-in default access rule.


You are safe from this vulnerability if your virtualhost only uses a regexp-based rule to trigger logout

If you are in this situation, you need to modify all your handler-protected virtualhosts by making the following change:

  • Replace fastcgi_param X_ORIGINAL_URI $request_uri by fastcgi_param X_ORIGINAL_URI $original_uri if you are using FastCGI

  • Replace uwsgi_param X_ORIGINAL_URI $request_uri by uwsgi_param X_ORIGINAL_URI $original_uri if you are using uWSGI

  • Right after auth_request /lmauth;, add the following line

    set $original_uri $uri$is_args$args;

You can check the Manage virtual hosts page for more information

LDAP certificate validation (CVE-2020-16093)

LDAP server certificates were previously not verified by default when using secure transports (LDAPS or TLS), see CVE-2020-16093. Starting from this release, certificate validation is now enabled by default, including on existing installations.

If you have configured your CA certificates incorrectly, LemonLDAP::NG will now start complaining about invalid certificates. You may temporarily disable it again with the following command

/your/path/to/lemonldap-ng-cli set ldapVerify none

If you use LDAP as a configuration storage, and want to temporarily disable certificate validation, you must make the following addition to /etc/lemonldap-ng/lemonldap-ng.ini

ldapVerify = none

If you use LDAP as a session backend, you are strongly encouraged to also upgrade corresponding Apache::Session modules (Apache::Session::LDAP or Apache::Session::Browseable). After this upgrade, if you want to temporarily disable certificate validation, you can add the following parameter to the list of Apache::Session module options:

  • key: ldapVerify

  • value: none

Please note that it is HIGHLY recommended to set certificate validation to require when contacting LDAP servers over a secure transport to avoid man-in-the-middle attacks.


  • New dependency: Perl module Time::Fake is now required to run unit test and build packages, but should not be mandatory to run the software.

  • Nginx configuration: some changes are required to allow IPv6, see #2152

  • Option singleSessionUserByIP was removed, see #2159

  • A memory leak was found in perl-fcgi with Perl < 5.18, a workaround is possible with Apache and llng-fastcgi-server, see #1314

    • With Apache: set FcgidMaxRequestsPerProcess 500 in portal virtual host

    • With llng-fastcgi-server: set PM_MAX_REQUESTS=500 in llng-fastcgi-server service configuration

  • Cookie SameSite value: to avoid problems with recent browsers, SAML POST binding, LLNG cookies are now tagged as “SameSite=None”. You can change this value using manager, “SameSite=Lax” is best for installations without federations. Important note: if you’re using an unsecured connection (http:// instead of https://), “SameSite=None” will be ignored by browsers and users that already have a valid session might be prompted to login again.

  • OAuth2.0 Handler: a VHost protected by the OAuth2.0 handler will now return a 401 when called without an Access Token, instead of redirecting to the portal, as specified by RFC 6750#section-3.

  • If you encounter the following issue:

AH01630: client denied by server configuration: /usr/share/lemonldap-ng/manager/api/api.fcgi

when trying to access the portal. It probably comes from incorrect Apache configuration. Remove the (optional and disabled by default) manager API config:

rm /etc/httpd/conf.d/z-lemonldap-ng-api.conf && systemctl reload httpd


  • Security:

    • #2040: Configuration of a redirection URI for an OpenID Connect Relying Party is now mandatory, as defined in the specifications. If you save your configuration, you will have an error if some of your RP don’t have a redirect URI configured.

    • #1943 / CVE-2019-19791: along with the patch provided in 2.0.7 in Lemonldap/NG/Common/PSGI/Request.pm, Apache rewrite rule must be updated to avoid an unprotected access to REST services:

RewriteCond "%{REQUEST_URI}" "!^/(?:(?:static|javascript|favicon).*|.*\.fcgi(?:/.*)?)$"
RewriteRule "^/(.+)$" "/index.fcgi/$1" [PT]
RewriteCond "%{REQUEST_URI}" "!^/(?:static|doc|lib|javascript|favicon).*"
RewriteRule "^/(.+)$" "/manager.fcgi/$1" [PT]
  • Other:

    • Option checkTime was enabled by default in lemonldap-ng.ini, this let the portal check the configuration immediately instead of waiting for configuration cache expiration. You can keep this option enabled unless you need strong performances.

  • Removed parameters:

    • samlIdPResolveCookie


  • Option was added to display generate password box in password reset by mail plugin. If you use this feature, you must enable this option, which is disabled by default.

  • If you use the default _whatToTrace macro and a case insensitive authentication backend, then a user can generate several persistent sessions for the same login (see issue 1869). This can lead to a security bug if you enabled 2FA, which rely on data stored in the persistent session. To fix this, either choose a unique attribute for _whatToTrace, either force lower case in your macro:

$_auth eq 'SAML' ? lc($_user.'@'.$_idpConfKey) : $_auth eq 'OpenIDConnect' ? lc($_user.'@'.$_oidc_OP) : lc($_user)
  • On CentOS 7 / RHEL 7, a system upgrade breaks ImageMagick, which is used to display captchas (see #1951). To fix this, you can run the following commands:

yum install -y urw-base35-fonts-legacy
sed 's,/usr/share/fonts/default/Type1/,/usr/share/X11/fonts/urw-fonts/,g' -i /etc/ImageMagick/type-ghostscript.xml


  • The Text::Unidecode perl module becomes a requirement (it will be automatically installed if you upgrade from from the deb or RPM repositories)

  • CAS logout starts validating the service= parameter, but only if you use the CAS Access control policy. The URL sent in the service= parameter will be checked against known CAS applications, Virtual Hosts, and trusted domains. Add your target domain to trusted domains if you suddenly start having “Invalid URL” messages on logout

  • Improvements in cryptographic functions: to take advantage of them, you must change the encryption key of LemonLDAP::NG (see CLI example).

  • Debian packaging: FastCGI / uWsgi servers require llng-lmlog.conf and llng-lua-headers.conf. Those configuration files are now provided by lemonldap-ng-handler package and installed in /etc/nginx/snippets directory.

Upgrading from 2.0.0 or 2.0.1 to later versions

If you have installed LemonLDAP::NG from official RPMs, you may run into bug #1757 and lose your Apache configuration files while updating from LemonLDAP::NG 2.0.0 or 2.0.1 to later versions. Please backup your /etc/httpd/conf.d/z-lemonldap-ng-*.conf files before the update.

Upgrade from 1.9 to 2.0


2.0 is a major release, lot of things have been changed. You must read this document before upgrade.

Upgrade order from 1.9.*

As usual, if you use more than 1 server and don’t want to stop SSO service AND IF YOU HAVE NO INCOMPATIBILITY MENTIONED IN THIS DOCUMENT, upgrade must be done in the following order:

  1. servers with handlers only;

  2. portal servers (all together if your load balancer is stateless (user or client IP) and if users use the menu);

  3. manager server


You must revalidate your configuration using the manager.



French documentation is no more available. Only English version of this documentation is maintained now.

This release of LL::NG requires these minimal versions of GNU/Linux distributions:

  • Debian 9 (stretch)

  • Ubuntu 16.04 LTS

  • CentOS 7

  • RHEL 7

For SAML features, we require at least Lasso 2.5 and we recommend Lasso 2.6.


  • lemonldap-ng.ini requires some new fields in portal section. Update yours using the one given installed by default. New requires fields are:

    • staticPrefix (manager and portal): the path to static content

    • templateDir (manager and portal): the path to templates directory

    • languages (manager and portal): accepted languages

  • Portal skins are now in /usr/share/lemonldap-ng/portal/templates. See skin customization to adapt your templates.

  • User module in authentication parameters now provides a “Same as authentication” value. You must revalidate it in the manager since all special values must be replaced by this (Multi, Choice, Proxy, Slave, SAML, OpenID,…)*

  • “Multi” doesn’t exist anymore: it is replaced by Combination, a more powerful module.

  • Apache and Nginx configurations must be updated to use FastCGI portal

  • URLs for mail reset and register pages have changed, you must update configuration parameters. For example:

mailUrl => 'http://auth.example.com/resetpwd',
registerUrl => 'http://auth.example.com/register',


Apache mod_perl has got lot of troubleshooting problems since 2.4 version (many segfaults,…), especially when using MPM worker or MPM event. That’s why LL::NG doesn’t use anymore ModPerl::Registry: all is now handled by FastCGI (portal and manager), except for Apache2 Handler.

For Handlers, it is now recommended to migrate to Nginx, but Apache 2.4 is still supported with MPM prefork.

Configuration refresh

Now portal has the same behavior than handlers: it looks to configuration stored in local cache every 10 minutes. So it has to be reload like every handler.


If you want to use reload mechanism on a portal only host, you must install a handler in Portal host to be able to refresh local cache. Include handler-nginx.conf or handler-apache2.conf for example

LDAP connection

Now LDAP connections are kept open to improve performances. To allow that, LL::NG requires an anonymous access to LDAP RootDSE entry to check connection.

Kerberos or SSL usage

  • A new Kerberos authentication backend has been added since 2.0. This module solves many Kerberos integration problems (usage in conjunction with other backends, better error display,…). However, you can retain the old integration manner (using Apache authentication module).

  • For SSL, a new Ajax option can be used in the same idea: so SSL can be used in conjunction with other backends.


  • Syslog: logs are now configured in lemonldap-ng.ini file only. If you use Syslog, you must reconfigure it. See logs for more.

  • Apache2: Portal doesn’t use anymore Apache2 logger. Logs are always written to Apache error.log but Apache “LogLevel” parameter has no more effect on it. Portal is now a FastCGI application and doesn’t use anymore ModPerl. See logs for more.

  • If you are running behind a proxy, make sure LemonLDAP::NG can see the original IP address of incoming HTTP connections


LLNG portal now embeds the following features:

  • CSRF protection (Cross-Site Request Forgery): a token is built for each form. To disable it, set requireToken to 0 (portal security parameters in the manager)

  • Content-Security-Policy header: portal build dynamically this header. You can modify default values in the manager (Général parameters » Advanced parameters » Security » Content-Security-Policy)


  • Apache only:

    • Apache handler is now Lemonldap::NG::Handler::ApacheMP2 and Menu is now Lemonldap::NG::Handler::ApacheMP2::Menu

    • because of an Apache behaviour change, PerlHeaderParserHandler must no more be used with “reload” URLs (replaced by PerlResponseHandler). Any “reload url” that are inside a protected vhost must be unprotected in vhost rules (protection has to be done by web server configuration).

  • CDA, ZimbraPreAuth, SecureToken and AuthBasic are now Handler Types. So there is no more special file to load: you just have to choose “VirtualHost type” in the manager/VirtualHosts.

  • SSOCookie: Since Firefox 60 and Chrome 68, “+2d, +5M, 12h and so on…” cookie expiration time notation is no more supported. CookieExpiration value is a number of seconds until the cookie expires. A zero or negative number will expire the cookie immediately.

Rules and headers

  • hostname() and remote_ip() are no more provided to avoid some name conflicts replaced by `$ENV{}`)

  • $ENV{<cgi_variable>} is now available everywhere: see Writing rules and headers

  • some variable names have changed. See Variables document

Opening conditions

  • Rule and message fields have been swaped. You have to modifiy and validate again your access rules.

Supported servers

  • Apache-1.3 files are not provided now. You can build them yourself by looking at Apache-2 configuration files

Ajax requests

Before 2.0, an Ajax query launched after session timeout received a 302 code. Now a 401 HTTP code is returned. WWW-Authenticate header contains: SSO <portal-URL>

SOAP/REST services

  • SOAP server activation is now split in 2 parameters (configuration/sessions). You must set them else SOAP service will be disabled

  • Notifications are now REST/JSON by default. You can force old format in the manager. Note that SOAP proxy has changed: http://portal/notifications now.

  • If you use “adminSessions” endpoint with “singleSession*” features, you must upgrade all portals simultaneously

  • SOAP services can be replaced by new REST services


AuthBasic Handler uses now REST services instead of SOAP.


CAS authentication module no more use perl CAS client, but our own code. You can now define several CAS servers in a specific branch in Manager, like you can define several SAML or OpenID Connect providers.

CAS issuer module has also been improved, you must modify the configuration of CAS clients to move them from virtual host branch to CAS client branch.

Developer corner


Portal has now many REST features and includes an API plugin. See Portal manpages to learn how to write auth modules, issuers or other features.

Portal overview

Portal is no more a single CGI object. Since 2.0, It is based on Plack/PSGI and Mouse modules. Little resume

Portal object
  +-> auth module
  +-> userDB module
  +-> issuer modules
  +-> other plugins (notification,...)

Requests are independent objects based on Lemonldap::NG::Portal::Main::Request which inherits from Lemonldap::NG::Common::PSGI::Request which inherits from Plack::Request. See manpages for more.


Handler libraries have been totally rewritten. If you’ve made custom handlers, they must be rewritten, see customhandlers.

If you used self protected CGI, you also need to rewrite them, see documentation.