Bug 2253291 (CVE-2023-6377) - CVE-2023-6377 xorg-x11-server: out-of-bounds memory reads/writes in XKB button actions
Summary: CVE-2023-6377 xorg-x11-server: out-of-bounds memory reads/writes in XKB butto...
Keywords:
Status: NEW
Alias: CVE-2023-6377
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2254291 2254292
Blocks: 2253250
TreeView+ depends on / blocked
 
Reported: 2023-12-06 17:03 UTC by Robb Gatica
Modified: 2024-04-03 08:05 UTC (History)
1 user (show)

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. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code execution in cases where X11 forwarding is involved.
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:7886 0 None None None 2023-12-20 13:22:19 UTC
Red Hat Product Errata RHSA-2024:0006 0 None None None 2024-01-02 08:42:51 UTC
Red Hat Product Errata RHSA-2024:0009 0 None None None 2024-01-02 08:25:28 UTC
Red Hat Product Errata RHSA-2024:0010 0 None None None 2024-01-02 08:53:20 UTC
Red Hat Product Errata RHSA-2024:0014 0 None None None 2024-01-02 08:54:13 UTC
Red Hat Product Errata RHSA-2024:0015 0 None None None 2024-01-02 08:54:22 UTC
Red Hat Product Errata RHSA-2024:0016 0 None None None 2024-01-02 08:54:30 UTC
Red Hat Product Errata RHSA-2024:0017 0 None None None 2024-01-02 08:42:28 UTC
Red Hat Product Errata RHSA-2024:0018 0 None None None 2024-01-02 08:55:39 UTC
Red Hat Product Errata RHSA-2024:0020 0 None None None 2024-01-02 08:54:55 UTC

Description Robb Gatica 2023-12-06 17:03:37 UTC 
CVE-2023-6377: X.Org server: Out-of-bounds memory write in XKB button actions

Introduced in: xorg-server-1.6.0 (2009)
Fixed in: xorg-server-21.1.10 and xwayland-23.2.3
Found by: Jan-Niklas Sohn working with Trend Micro Zero Day Initiative

A device has XKB button actions for each button on the device. When a logical
device switch happens (e.g. moving from a touchpad to a mouse), the server
re-calculates the information available on the respective master device
(typically the Virtual Core Pointer). This re-calculation only allocated enough
memory for a single XKB action rather instead of enough for the newly active
physical device's number of button. As a result, querying or changing the XKB
button actions results in out-of-bounds memory reads and writes.

This may lead to local privilege escalation if the server is run as root or
remote code execution (e.g. x11 over ssh).

xorg-server-21.1.10 and xwayland-23.2.3 have been patched to fix this issue.
Comment 4 TEJ RATHI 2023-12-13 05:48:13 UTC 
This CVE is public now:
https://lists.x.org/archives/xorg-announce/2023-December/003435.html
Comment 5 TEJ RATHI 2023-12-13 05:49:30 UTC 
Upstream Fix: https://gitlab.freedesktop.org/xorg/xserver/-/commit/0c1a93d319558fe3ab2d94f51d174b4f93810afd
Comment 6 Sandipan Roy 2023-12-13 06:11:50 UTC 
Created xorg-x11-server tracking bugs for this issue:

Affects: fedora-all [bug 2254291]


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

Affects: fedora-all [bug 2254292]
Comment 7 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 8 errata-xmlrpc 2024-01-02 08:25:27 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 9 errata-xmlrpc 2024-01-02 08:42:27 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 10 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 11 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 12 errata-xmlrpc 2024-01-02 08:54:12 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 13 errata-xmlrpc 2024-01-02 08:54:21 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 14 errata-xmlrpc 2024-01-02 08:54:29 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 15 errata-xmlrpc 2024-01-02 08:54:54 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 16 errata-xmlrpc 2024-01-02 08:55:39 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
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