Rapid7 Vulnerability & Exploit Database

Red Hat: CVE-2021-39191: CVE-2021-39191 mod_auth_openidc: open redirect due to target_link_uri parameter not validated (Multiple Advisories)

Free InsightVM Trial No Credit Card Necessary
2024 Attack Intel Report Latest research by Rapid7 Labs
Back to Search

Red Hat: CVE-2021-39191: CVE-2021-39191 mod_auth_openidc: open redirect due to target_link_uri parameter not validated (Multiple Advisories)

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Published
09/03/2021
Created
05/14/2022
Added
05/13/2022
Modified
12/15/2023

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.

Solution(s)

  • redhat-upgrade-cjose
  • redhat-upgrade-cjose-debuginfo
  • redhat-upgrade-cjose-debugsource
  • redhat-upgrade-cjose-devel
  • redhat-upgrade-mod_auth_openidc
  • redhat-upgrade-mod_auth_openidc-debuginfo
  • redhat-upgrade-mod_auth_openidc-debugsource

References

  • CVE-2021-39191
  • RHSA-2022:1823

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;