CVE-2021-32786

CWE-601 — Open Redirect6 documents6 sources
Severity
6.1MEDIUM
EPSS
0.1%
top 74.29%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Zmartzone MOD Auth OpenidcOpenidc MOD Auth OpenidcFedoraproject Fedora
Timeline
PublishedJul 22

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 th…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:NExploitability: 2.8 | Impact: 1.4

Affected Packages3 packages

▶Debianlibapache2-mod-auth-openidc< 2.4.9-1+3
▶CVEListV5zmartzone/mod_auth_openidc< 2.4.9

Also affects: Fedora 33, 34

Patches

Patch: github.com ↗Patch: www.oracle.com ↗Patch: github.com ↗

🔴Vulnerability Details

2
OSV
CVE-2021-32786: mod_auth_openidc is an authentication/authorization module for the Apache 2↗2021-07-22
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CVEList
Open Redirect in oidc_validate_redirect_url()↗2021-07-22
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📋Vendor Advisories

3
Red Hat
mod_auth_openidc: open redirect in oidc_validate_redirect_url()↗2021-07-22
▶
Microsoft
Open Redirect in oidc_validate_redirect_url()↗2021-07-13
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Debian
CVE-2021-32786: libapache2-mod-auth-openidc - mod_auth_openidc is an authentication/authorization module for the Apache 2.x HT...↗2021
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