Bug 2253298 (CVE-2023-6478)

Summary:	CVE-2023-6478 xorg-x11-server: out-of-bounds memory read in RRChangeOutputProperty and RRChangeProviderProperty
Product:	[Other] Security Response	Reporter:	Robb Gatica <rgatica>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	peter.hutterer, rkeshri, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	xorg-server-21.1.10, xwayland-23.2.3	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive information.	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:	2254293, 2254294
Bug Blocks:	2253250

Description Robb Gatica 2023-12-06 17:37:46 UTC

CVE-2023-6478: X.Org server: Out-of-bounds memory read in RRChangeOutputProperty and RRChangeProviderProperty

Introduced in: xorg-server-1.4.0 (2007) and xorg-server-1.13.0 (2012), respectively
Fixed in: xorg-server-21.1.10 and xwayland-23.2.3
Found by: Jan-Niklas Sohn working with Trend Micro Zero Day Initiative

This fixes an OOB read and the resulting information disclosure.

Length calculation for the request was clipped to a 32-bit integer. With
the correct stuff->nUnits value the expected request size was
truncated, passing the REQUEST_FIXED_SIZE check.

The server then proceeded with reading at least stuff->nUnits bytes
(depending on stuff->format) from the request and stuffing whatever it
finds into the property. In the process it would also allocate at least
stuff->nUnits bytes, i.e. 4GB.

See also CVE-2022-46344 where this issue was fixed for other requests.

xorg-server-21.1.10 and xwayland-23.2.3 have been patched to fix this issue.

Comment 5 TEJ RATHI 2023-12-13 05:48:17 UTC

This CVE is public now:
https://lists.x.org/archives/xorg-announce/2023-December/003435.html

Comment 6 TEJ RATHI 2023-12-13 05:50:03 UTC

Upstream Fix: https://gitlab.freedesktop.org/xorg/xserver/-/commit/14f480010a93ff962fef66a16412fafff81ad632

Comment 7 Sandipan Roy 2023-12-13 06:12:28 UTC

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

Affects: fedora-all [bug 2254293]


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

Affects: fedora-all [bug 2254294]

Comment 8 errata-xmlrpc 2023-12-20 13:22:18 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2023:7886 https://access.redhat.com/errata/RHSA-2023:7886

Comment 9 errata-xmlrpc 2024-01-02 08:25:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2024:0009 https://access.redhat.com/errata/RHSA-2024:0009

Comment 10 errata-xmlrpc 2024-01-02 08:42:30 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support
  Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.2 Telecommunications Update Service

Via RHSA-2024:0017 https://access.redhat.com/errata/RHSA-2024:0017

Comment 11 errata-xmlrpc 2024-01-02 08:42:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2024:0006 https://access.redhat.com/errata/RHSA-2024:0006

Comment 12 errata-xmlrpc 2024-01-02 08:53:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:0010 https://access.redhat.com/errata/RHSA-2024:0010

Comment 13 errata-xmlrpc 2024-01-02 08:54:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:0014 https://access.redhat.com/errata/RHSA-2024:0014

Comment 14 errata-xmlrpc 2024-01-02 08:54:22 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:0015 https://access.redhat.com/errata/RHSA-2024:0015

Comment 15 errata-xmlrpc 2024-01-02 08:54:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.4 Telecommunications Update Service

Via RHSA-2024:0016 https://access.redhat.com/errata/RHSA-2024:0016

Comment 16 errata-xmlrpc 2024-01-02 08:54:56 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2024:0020 https://access.redhat.com/errata/RHSA-2024:0020

Comment 17 errata-xmlrpc 2024-01-02 08:55:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:0018 https://access.redhat.com/errata/RHSA-2024:0018

Comment 20 errata-xmlrpc 2024-04-30 09:43:13 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2170 https://access.redhat.com/errata/RHSA-2024:2170

Comment 21 errata-xmlrpc 2024-04-30 09:43:23 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2169 https://access.redhat.com/errata/RHSA-2024:2169

Comment 22 errata-xmlrpc 2024-05-22 09:32:36 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:2995 https://access.redhat.com/errata/RHSA-2024:2995

Comment 23 errata-xmlrpc 2024-05-22 09:32:46 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:2996 https://access.redhat.com/errata/RHSA-2024:2996