CVE-2021-39191

Published on: 09/03/2021 12:00:00 AM UTC

Last Modified on: 09/10/2022 02:46:00 AM UTC

CVE-2021-39191 - advisory for GHSA-2pgf-8h6h-gqg2

Source: Mitre Source: NIST CVE.ORG Print: PDF PDF
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Certain versions of Fedora from Fedoraproject contain the following vulnerability:

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.

  • CVE-2021-39191 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • Affected Vendor/Software: URL Logo zmartzone - mod_auth_openidc version <=2.4.9.3

CVSS3 Score: 6.1 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW NONE REQUIRED
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
CHANGED LOW LOW NONE

CVSS2 Score: 5.8 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK MEDIUM NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL PARTIAL NONE

CVE References

Description Tags Link
[SECURITY] Fedora 36 Update: mod_auth_openidc-2.4.9.4-1.fc36 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
text/html
URL Logo FEDORA FEDORA-2022-814ee0c43b
[SECURITY] Fedora 35 Update: mod_auth_openidc-2.4.9.4-1.fc35 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
text/html
URL Logo FEDORA FEDORA-2021-8d9aca2ded
URL Redirection to Untrusted Site ('Open Redirect') in mod_auth_openidc · Advisory · zmartzone/mod_auth_openidc · GitHub github.com
text/html
URL Logo CONFIRM github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2
open redirect for target_link_uri parameter · Issue #672 · zmartzone/mod_auth_openidc · GitHub github.com
text/html
URL Logo MISC github.com/zmartzone/mod_auth_openidc/issues/672
apply OIDCRedirectURLsAllowed setting to target_link_uri · zmartzone/[email protected] · GitHub github.com
text/html
URL Logo MISC github.com/zmartzone/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d
Release release 2.4.9.4 · zmartzone/mod_auth_openidc · GitHub github.com
text/html
URL Logo MISC github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4

Related QID Numbers

  • 159800 Oracle Enterprise Linux Security Update for mod_auth_openidc:2.3 (ELSA-2022-1823)
  • 180819 Debian Security Update for libapache2-mod-auth-openidc (CVE-2021-39191)
  • 240273 Red Hat Update for mod_auth_openidc:2.3 (RHSA-2022:1823)
  • 282124 Fedora Security Update for mod_auth_openidc (FEDORA-2021-8d9aca2ded)
  • 377581 Alibaba Cloud Linux Security Update for mod_auth_openidc:2.3 (ALINUX3-SA-2022:0135)
  • 751211 SUSE Enterprise Linux Security Update for apache2-mod_auth_openidc (SUSE-SU-2021:3352-1)
  • 901550 Common Base Linux Mariner (CBL-Mariner) Security Update for mod_auth_openidc (7289)
  • 940537 AlmaLinux Security Update for mod_auth_openidc:2.3 (ALSA-2022:1823)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System
FedoraprojectFedora35AllAllAll
Operating
System
FedoraprojectFedora36AllAllAll
ApplicationZmartzoneMod Auth OpenidcAllAllAllAll
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*:
  • cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*:
  • cpe:2.3:a:zmartzone:mod_auth_openidc:*:*:*:*:*:*:*:*:

Social Mentions

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