Open Redirect Affecting libapache2-mod-auth-openidc package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1.75% (76th percentile)

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  • Snyk IDSNYK-UBUNTU2004-LIBAPACHE2MODAUTHOPENIDC-1582769
  • published4 Sept 2021
  • disclosed3 Sept 2021

Introduced: 3 Sep 2021

CVE-2021-39191  (opens in a new tab)
CWE-601  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:20.04 libapache2-mod-auth-openidc.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libapache2-mod-auth-openidc package and not the libapache2-mod-auth-openidc package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1