Description

A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability.

INFO

Published Date :

2025-04-29T11:56:50.808Z

Last Modified :

2025-11-11T12:09:56.342Z

Source :

redhat
AFFECTED PRODUCTS

The following products are affected by CVE-2025-3891 vulnerability.

Vendors Products
Apache
  • Http Server
Debian
  • Debian Linux
Redhat
  • Enterprise Linux
  • Rhel Aus
  • Rhel E4s
  • Rhel Eus
  • Rhel Tus
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-3891.

URL Resource
https://access.redhat.com/errata/RHSA-2025:10002 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2025:10003 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2025:10004 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2025:10006 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2025:10007 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2025:10008 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2025:10010 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2025:4597 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2025:9396 cve-icon cve-icon
https://access.redhat.com/security/cve/CVE-2025-3891 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2361633 cve-icon cve-icon
https://github.com/OpenIDC/mod_auth_openidc/commit/6a0b5f66c87184dfe0e4400f6bdd46a82dc0ec2b cve-icon cve-icon
https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-x7cf-8wgv-5j86 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/05/msg00007.html cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-3891 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-3891 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact