CVE-2021-39191

 

Published at: - 03-09-2021 04:15

Last modified: - 10-09-2022 04:46

Total changes: - 8

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

 

Verification logic

 

Reference

• https://github.com/zmartzone/mod_auth_openidc/issues/672
• https://github.com/zmartzone/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d
• https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4
• https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2
• FEDORA-2021-8d9aca2ded-Mailing List, Third Party Advisory
• FEDORA-2022-814ee0c43b-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2021-39191

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures