Bug 2026074 (CVE-2021-4011)

Summary:	CVE-2021-4011 xorg-x11-server: SwapCreateRegister out-of-bounds access
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	ajax, bskeggs, caillon+fedoraproject, jglisse, mvanderw, ofourdan, rhughes, rstrode, sandmann, security-response-team, xgl-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	xorg-x11-server 21.1.2, xorg-x11-server 1.20.14	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in xorg-x11-server where an out-of-bounds access can occur in the SwapCreateRegister function.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-01-03 11:12:09 UTC	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:	2030179, 2030180, 2030181, 2032945, 2038073, 2038074
Bug Blocks:	2026049, 2026076

Description Guilherme de Almeida Suckevicz 2021-11-23 17:33:45 UTC

As per upstream:


The handlers for the RecordCreateContext and RecordRegisterClients requests of the Record extension do not properly validate the request length leading to out of bounds memory write.

Comment 2 Guilherme de Almeida Suckevicz 2021-12-15 14:21:37 UTC

Created xorg-x11-server tracking bugs for this issue:

Affects: fedora-all [bug 2032945]

Comment 3 errata-xmlrpc 2022-01-03 10:21:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2022:0003 https://access.redhat.com/errata/RHSA-2022:0003

Comment 4 Product Security DevOps Team 2022-01-03 11:12:07 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-4011

Comment 5 errata-xmlrpc 2022-05-10 14:18:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1917 https://access.redhat.com/errata/RHSA-2022:1917