Debian 9822 Published by

A libapache2-mod-auth-openidc security update has been released for Debian GNU/Linux 10 LTS to address several vulnerabilities.

DLA 3409-1: libapache2-mod-auth-openidc security update

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Debian LTS Advisory DLA-3409-1 Adrian Bunk
April 30, 2023
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Package : libapache2-mod-auth-openidc
Version :
CVE ID : CVE-2019-20479 CVE-2021-32785 CVE-2021-32786 CVE-2021-32791
CVE-2021-32792 CVE-2023-28625
Debian Bug : 991580 991581 991582 991583 1033916

Several vulnerabilities were fixed in libapache2-mod-auth-openidc,
an OpenID Connect Relying Party implementation for Apache.


Insufficient validatation of URLs beginning with a slash and backslash.


Crash when using an unencrypted Redis cache.


Open Redirect vulnerability in the logout functionality.


AES GCM encryption in used static IV and AAD.


XSS vulnerability when using OIDCPreservePost.


NULL pointer dereference with OIDCStripCookies.

For Debian 10 buster, these problems have been fixed in version

We recommend that you upgrade your libapache2-mod-auth-openidc packages.

For the detailed security status of libapache2-mod-auth-openidc please refer to
its security tracker page at:

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