CVE - CVE-2021-32786

CVE-ID
CVE-2021-32786	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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, `oidc_validate_redirect_url()` does not parse URLs the same way as most browsers do. As a result, this function can be bypassed and leads to an Open Redirect vulnerability in the logout functionality. This bug has been fixed in version 2.4.9 by replacing any backslash of the URL to redirect with slashes to address a particular breaking change between the different specifications (RFC2396 / RFC3986 and WHATWG). As a workaround, this vulnerability can be mitigated by configuring `mod_auth_openidc` to only allow redirection whose destination matches a given regular expression.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-xm4c-5wm5-jqv7 URL:https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-xm4c-5wm5-jqv7 CONFIRM:https://security.netapp.com/advisory/ntap-20210902-0001/ URL:https://security.netapp.com/advisory/ntap-20210902-0001/ FEDORA:FEDORA-2021-17f5cedf66 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QXAWKPT5LXZSUTFSJ6IWSZC7RMYYQXQD/ FEDORA:FEDORA-2021-e3017c538a URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FZVF6BSJLRQZ7PFFR4X5JSU6KUJYNOCU/ MISC:https://daniel.haxx.se/blog/2017/01/30/one-url-standard-please/ URL:https://daniel.haxx.se/blog/2017/01/30/one-url-standard-please/ MISC:https://github.com/zmartzone/mod_auth_openidc/commit/3a115484eb927bc6daa5737dd84f88ff4bbc5544 URL:https://github.com/zmartzone/mod_auth_openidc/commit/3a115484eb927bc6daa5737dd84f88ff4bbc5544 MISC:https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9 URL:https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9 MISC:https://www.oracle.com/security-alerts/cpuapr2022.html URL:https://www.oracle.com/security-alerts/cpuapr2022.html MLIST:[debian-lts-announce] 20230430 [SECURITY] [DLA 3409-1] libapache2-mod-auth-openidc security update URL:https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20210512	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210512)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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