Open Redirect Affecting mod_auth_openidc:2.3/mod_auth_openidc package, versions <0:2.3.7-11.module_el8.6.0+2868+44838709


Severity

Recommended
0.0
medium
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
1.75% (76th percentile)

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  • Snyk IDSNYK-ALMALINUX8-MODAUTHOPENIDC-5630223
  • published28 May 2023
  • disclosed10 May 2022

Introduced: 10 May 2022

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

How to fix?

Upgrade AlmaLinux:8 mod_auth_openidc:2.3/mod_auth_openidc to version 0:2.3.7-11.module_el8.6.0+2868+44838709 or higher.
This issue was patched in ALSA-2022:1823.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mod_auth_openidc:2.3/mod_auth_openidc package and not the mod_auth_openidc:2.3/mod_auth_openidc package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 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