CVE-2023-28625

mod_auth_openidc core dump when OIDCStripCookies is set and an empty Cookie header is supplied

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

mod_auth_openidc is an authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. In versions 2.0.0 through 2.4.13.1, when `OIDCStripCookies` is set and a crafted cookie supplied, a NULL pointer dereference would occur, resulting in a segmentation fault. This could be used in a Denial-of-Service attack and thus presents an availability risk. Version 2.4.13.2 contains a patch for this issue. As a workaround, avoid using `OIDCStripCookies`.

A flaw was found in mod_auth_openidc, an OpenID Certified™ authentication and authorization module for the Apache HTTP server. It is possible to trigger a NULL pointer dereference when `OIDCStripCookies` is set and a crafted `Cookie` header is supplied, leading to a segmentation fault and a denial of service.

It was discovered that missing input sanitizing in the implementation of the OIDCStripCookie option in mod_auth_openidc could result in denial of service.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-03-20 CVE Reserved
2023-04-03 CVE Published
2025-02-13 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (9)

URL	Tag	Source
https://github.com/OpenIDC/mod_auth_openidc/blame/3f11976dab56af0a46a7dddb7a275cc16d6eb726/src/mod_auth_openidc.c#L178-L179	Third Party Advisory
https://github.com/OpenIDC/mod_auth_openidc/releases/tag/v2.4.13.2	Release Notes
https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-f5xw-rvfr-24qr	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00034.html	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WIBKFC22PDH6UXMSZ23PHTD7736ZC7BB
https://www.debian.org/security/2023/dsa-5405	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/OpenIDC/mod_auth_openidc/commit/c0e1edac3c4c19988ccdc7713d7aebfce6ff916a	2023-05-31

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-28625	2023-11-14
https://bugzilla.redhat.com/show_bug.cgi?id=2184118	2023-11-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openidc Search vendor "Openidc"		Mod Auth Openidc Search vendor "Openidc" for product "Mod Auth Openidc"				>= 2.0.0 < 2.4.13.2 Search vendor "Openidc" for product "Mod Auth Openidc" and version " >= 2.0.0 < 2.4.13.2"		-		Affected