/ 
Lemonldap-NG-Portal-2.22.1
/ purgeCentralCache
Security Advisories (1)
CVE-2026-19349 (2026-08-16)

Lemonldap::NG::Portal versions from 2.0.0 before 2.16.9, from 2.17.0 before 2.21.5, from 2.22.0 before 2.23.3 for Perl allow authentication bypass via an OAuth2 state parameter stored as an SSO session in the GitHub and LinkedIn backends. Before redirecting to the identity provider, extractFormInfo() creates the state session with the positional call `getApacheSession( undef, 1, 0, 'GitHubState' )`. getApacheSession() takes a session id followed by a named argument hash, so the trailing arguments become that hash, `kind` defaults to SSO, and the state is written to the global session storage as a regular SSO session. Its identifier is handed to the unauthenticated visitor as the state parameter of the redirection URL. Any visitor who reaches the GitHub or LinkedIn endpoint can replay that identifier as a session cookie and obtain a valid SSO session without authenticating. The session holds neither _user nor authenticationLevel, which the shipped bootstrap configuration accepts because it grants virtual hosts a "default => accept" access rule; deployments whose rules test the user or require an authentication level are less exposed. Only configurations with the GitHub or LinkedIn authentication module enabled are affected.

NAME

purgeCentralCache - Remove expired LemonLDAP::NG sessions from central storage

SYNOPSIS

purgeCentralCache [options]

DESCRIPTION

This script must be run periodically on at least one LemonLDAP::NG hosts. It will search for expired SSO sessions, as well as secondary (SAML, CAS, OIDC) and utility (Captcha, Token) sessions, and remove them from the session backend.

OPTIONS

--help, -h

Print a brief help message and exit.

--debug, -d

Print additional diagnostics to STDERR

--force, -f

Remove sessions if an error happened during their processing

--json, -j

Log execution stats as JSON instead of human-readable text

SEE ALSO

http://lemonldap-ng.org/

AUTHORS

Xavier Guimard, <yadd@debian.org>

BUG REPORT

Use OW2 system to report bug or ask for features: https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues

DOWNLOAD

Lemonldap::NG is available at https://lemonldap-ng.org/download

COPYRIGHT AND LICENSE

This library is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.