libapache2-mod-auth-openidc: CVE-2021-39191

Debian Bug report logs - #993648
libapache2-mod-auth-openidc: CVE-2021-39191

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: libapache2-mod-auth-openidc: CVE-2021-39191

Date: Sat, 04 Sep 2021 10:07:13 +0200

Source: libapache2-mod-auth-openidc
Version: 2.4.9-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/zmartzone/mod_auth_openidc/issues/672
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for libapache2-mod-auth-openidc.

CVE-2021-39191[0]:
| mod_auth_openidc is an authentication/authorization module for the
| Apache 2.x HTTP server that functions as an OpenID Connect Relying
| Party, authenticating users against an OpenID Connect Provider. In
| versions prior to 2.4.9.4, the 3rd-party init SSO functionality of
| mod_auth_openidc was reported to be vulnerable to an open redirect
| attack by supplying a crafted URL in the `target_link_uri` parameter.
| A patch in version 2.4.9.4 made it so that the
| `OIDCRedirectURLsAllowed` setting must be applied to the
| `target_link_uri` parameter. There are no known workarounds aside from
| upgrading to a patched version.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-39191
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39191
[1] https://github.com/zmartzone/mod_auth_openidc/issues/672
[2] https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2
[3] https://github.com/zmartzone/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

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