CVE-2021-32786
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
16- Range: <2.4.9
<2.4.9+ 1 more
- (no CPE)range: <2.4.9
- (no CPE)range: < 2.4.9
- osv-coords13 versionspkg:rpm/almalinux/cjosepkg:rpm/almalinux/cjose-develpkg:rpm/almalinux/mod_auth_openidcpkg:rpm/opensuse/apache2-mod_auth_openidc&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/apache2-mod_auth_openidc&distro=openSUSE%20Leap%2015.3pkg:rpm/opensuse/apache2-mod_auth_openidc&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/apache2-mod_auth_openidc&distro=openSUSE%20Tumbleweedpkg:rpm/suse/apache2-mod_auth_openidc&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP2pkg:rpm/suse/apache2-mod_auth_openidc&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP3pkg:rpm/suse/apache2-mod_auth_openidc&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP6pkg:rpm/suse/apache2-mod_auth_openidc&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP7pkg:rpm/suse/apache2-mod_auth_openidc&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/apache2-mod_auth_openidc&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5
< 0.6.1-2.module_el8.6.0+2868+44838709+ 12 more
- (no CPE)range: < 0.6.1-2.module_el8.6.0+2868+44838709
- (no CPE)range: < 0.6.1-2.module_el8.6.0+2868+44838709
- (no CPE)range: < 2.3.7-11.module_el8.6.0+2868+44838709
- (no CPE)range: < 2.3.8-lp152.5.6.1
- (no CPE)range: < 2.3.8-3.15.1
- (no CPE)range: < 2.4.17.1-150600.16.14.1
- (no CPE)range: < 2.4.9.4-1.2
- (no CPE)range: < 2.3.8-3.15.1
- (no CPE)range: < 2.3.8-3.15.1
- (no CPE)range: < 2.4.17.1-150600.16.14.1
- (no CPE)range: < 2.4.17.1-150600.16.14.1
- (no CPE)range: < 2.4.0-3.23.1
- (no CPE)range: < 2.4.0-3.23.1
Patches
Vulnerability mechanics
References
9- github.com/zmartzone/mod_auth_openidc/commit/3a115484eb927bc6daa5737dd84f88ff4bbc5544nvdPatchThird Party Advisory
- www.oracle.com/security-alerts/cpuapr2022.htmlnvdPatchThird Party Advisory
- daniel.haxx.se/blog/2017/01/30/one-url-standard-please/nvdExploitThird Party Advisory
- github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9nvdRelease NotesThird Party Advisory
- github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-xm4c-5wm5-jqv7nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20210902-0001/nvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2023/04/msg00034.htmlnvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZVF6BSJLRQZ7PFFR4X5JSU6KUJYNOCU/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QXAWKPT5LXZSUTFSJ6IWSZC7RMYYQXQD/nvd
News mentions
0No linked articles in our index yet.