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CVE-2022-23527

Published: 14 December 2022

mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP server. Versions prior to 2.4.12.2 are vulnerable to Open Redirect. When providing a logout parameter to the redirect URI, the existing code in oidc_validate_redirect_url() does not properly check for URLs that start with /\t, leading to an open redirect. This issue has been patched in version 2.4.12.2. Users unable to upgrade can mitigate the issue by configuring mod_auth_openidc to only allow redirection when the destination matches a given regular expression with OIDCRedirectURLsAllowed.

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
libapache2-mod-auth-openidc
Launchpad, Ubuntu, Debian
kinetic Ignored
(end of life, was needs-triage)
bionic Needs triage

focal Needs triage

jammy Needs triage

trusty Ignored
(end of standard support)
upstream
Released (2.4.12.2-1)
xenial Needs triage

mantic Not vulnerable
(2.4.12.3-1)
lunar Ignored
(end of life, was needs-triage)

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N