A lemonldap-ng security update has been released for Debian GNU/Linux 9 LTS to address an issue in the default configuration files for running the Lemonldap::NG Web SSO system on the Nginx web server were susceptible to authorisation bypass of URL access rules.

DLA 2367-1: lemonldap-ng security update

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Debian LTS Advisory DLA-2367-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Xavier Guimard
September 07, 2020   https://wiki.debian.org/LTS
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Package : lemonldap-ng
Version : 1.9.7-3+deb9u4
CVE ID : CVE-2020-24660

lemonldap-ng community fixed a vulnerability in the Nginx default
configuration files (CVE-2020-24660).
Debian package does not install any default site, but documentation
provided insecure examples in Nginx configuration before this version.
If you use lemonldap-ng handler with Nginx, you should verify your
configuration files.

For Debian 9 stretch, this problem has been fixed in version
1.9.7-3+deb9u4.

We recommend that you upgrade your lemonldap-ng packages.

For the detailed security status of lemonldap-ng please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/lemonldap-ng

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS