UBUNTU-CVE-2021-39191
- Source
- https://ubuntu.com/security/CVE-2021-39191
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-39191.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-39191
- Upstream
- Published
- 2021-09-03T14:15:00Z
- Modified
- 2025-07-18T16:46:57Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N CVSS Calculator
- 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
modauthopenidc 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 modauthopenidc was reported to be vulnerable to an open redirect attack by supplying a crafted URL in the
target_link_uriparameter. A patch in version 2.4.9.4 made it so that theOIDCRedirectURLsAllowedsetting must be applied to thetarget_link_uriparameter. There are no known workarounds aside from upgrading to a patched version. - References
-
- https://ubuntu.com/security/CVE-2021-39191
- 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
- https://www.cve.org/CVERecord?id=CVE-2021-39191
Affected packages
Ubuntu:Pro:18.04:LTS / libapache2-mod-auth-openidc
Package
- Name
- libapache2-mod-auth-openidc
- Purl
- pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.3.3-1build1?arch=source&distro=esm-apps/bionic