Open Redirect in Openidc Mod Auth
CVE-2022-23527
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.
Vulnerability class: Open Redirect
EPSS: 0.009 (56.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.
Affected products
- Openidc Mod_auth_openidc
- Zmartzone Mod_auth_openidc — versions < 2.4.12.2
- Debian Debian_linux — versions 10.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC)
- security-advisories@github.com (Mailing List)
Frequently asked questions
- What is CVE-2022-23527?
- CVE-2022-23527 is a medium-severity vulnerability in Openidc Mod Auth, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.7/10. Published 2022-12-14.
- How severe is CVE-2022-23527?
- Medium severity. CVSS v3 base score is 4.7 out of 10.