Bug 2184118 (CVE-2023-28625)

Summary:	CVE-2023-28625 mod_auth_openidc: NULL pointer dereference when OIDCStripCookies is set and a crafted Cookie header is supplied
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aboscatt, spoore, thalman
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mod_auth_openidc 2.4.13.2	Doc Type:	If docs needed, set a value
Doc Text:	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.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2184119, 2184144, 2184145
Bug Blocks:	2184121

Description Pedro Sampaio 2023-04-03 17:20:49 UTC

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`.

References:

https://github.com/OpenIDC/mod_auth_openidc/releases/tag/v2.4.13.2
https://github.com/OpenIDC/mod_auth_openidc/commit/c0e1edac3c4c19988ccdc7713d7aebfce6ff916a
https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-f5xw-rvfr-24qr
https://github.com/OpenIDC/mod_auth_openidc/blame/3f11976dab56af0a46a7dddb7a275cc16d6eb726/src/mod_auth_openidc.c#L178-L179

Comment 1 Pedro Sampaio 2023-04-03 17:21:02 UTC

Created mod_auth_openidc tracking bugs for this issue:

Affects: fedora-all [bug 2184119]

Comment 4 errata-xmlrpc 2023-11-07 08:14:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6365 https://access.redhat.com/errata/RHSA-2023:6365

Comment 5 errata-xmlrpc 2023-11-14 15:17:07 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:6940 https://access.redhat.com/errata/RHSA-2023:6940