Heap-based buffer overflow in X.org Server and Xwayland - CVE-2023-6816

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Main Vulnerability Database Vulnerabilities #VU85447

Heap-based buffer overflow in X.org Server and Xwayland - CVE-2023-6816

Published: January 16, 2024 / Updated: February 12, 2024


Vulnerability identifier: #VU85447
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-6816
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the DeviceFocusEvent and ProcXIQueryPointer functions. A local user can trigger a heap-based buffer overflow and execute arbitrary code on the target system.


Affected software

X.org Server
Oracle SD-WAN Edge
Xwayland
Gentoo Linux
Amazon Linux AMI
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
Anolis OS
CentOS
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
SUSE Enterprise Storage
OpenBSD
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Ubuntu
Slackware Linux
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Desktop 15 SP4 LTSS
SUSE Linux Enterprise Server 15 SP4 LTSS
Basesystem Module
Development Tools Module
openSUSE Leap
openEuler
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
xserver-xorg-core (Ubuntu package)
xwayland (Ubuntu package)
tigervnc (Red Hat package)
tigervnc-icons
tigervnc-license
tigervnc-server-applet
tigervnc-server-module
tigervnc-server-minimal
tigervnc-server
tigervnc
tigervnc-selinux
xorg-x11-server
xorg-x11-server-sdk
xorg-x11-server-debuginfo
xorg-x11-server-debugsource
xorg-x11-server-extra-debuginfo
xorg-x11-server-extra
xorg-x11-server-wayland
xorg-x11-server-wayland-debuginfo
xorg-x11-server-source
xorg-x11-server-Xnest
xorg-x11-server-Xorg
xorg-x11-server-Xvfb
xorg-x11-server-Xdmx
xorg-x11-server-Xephyr
xorg-x11-server-Xwayland
xorg-x11-server-common
xorg-x11-server-devel
xorg-x11-server (Red Hat package)
xorg-x11-server-help
xorg-server (Debian package)
xorg-server-xvfb
xorg-server-xnest
xorg-server-xephyr
xorg-server
xorg-x11-server-Xwayland (Red Hat package)
xorg-server-xwayland
xwayland-debugsource
xwayland-devel
xwayland-debuginfo
xwayland
xorg-x11-server-Xvfb-debuginfo
x11-base/xorg-server
xorg-x11-server-Xwayland-debuginfo
xorg-x11-server-Xwayland-debugsource
xorg-x11-server-Xwayland-devel
x11-base/xwayland

How to mitigate CVE-2023-6816

Install updates from vendor's website.

X.org Server - update to 21.1.11
Xwayland - update to 23.2.4
Oracle SD-WAN Edge - update to 9.1.1.9.0
xserver-xorg-core (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 2:1.20.13-1ubuntu1~20.04.14, 2:1.20.13-1ubuntu1~20.04.15, 2:21.1.4-2ubuntu1.7~22.04.7, 2:21.1.4-2ubuntu1.7~22.04.8, 2:21.1.7-1ubuntu3.6, 2:21.1.7-3ubuntu2.6, 2:21.1.7-3ubuntu2.7
xwayland (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 2:1.20.13-1ubuntu1~20.04.14, 2:1.20.13-1ubuntu1~20.04.15, 2:22.1.1-1ubuntu0.10, 2:22.1.1-1ubuntu0.11, 2:22.1.8-1ubuntu1.4, 2:23.2.0-1ubuntu0.4
tigervnc (Red Hat package) - addressed in versions 1.1.0-25.el6_10.13, 1.8.0-31.el7_9, 1.9.0-15.el8_2.9, 1.11.0-8.el8_4.8, 1.11.0-22.el9_0.8, 1.12.0-6.el8_6.9, 1.12.0-14.el9_2.5, 1.12.0-15.el8_8.7, 1.13.1-2.el8_9.7
tigervnc-icons - addressed in versions 1.8.0-31, 1.13.1-3
tigervnc-license - addressed in versions 1.8.0-31, 1.13.1-3
tigervnc-server-applet - update to 1.8.0-31
tigervnc-server-module - addressed in versions 1.8.0-31, 1.13.1-3
tigervnc-server-minimal - addressed in versions 1.8.0-31, 1.13.1-3
tigervnc-server - addressed in versions 1.8.0-31, 1.13.1-3
tigervnc - addressed in versions 1.8.0-31, 1.13.1-3
tigervnc - addressed in versions 1.12.0, 1.13.1
tigervnc-selinux - update to 1.13.1-3
tigervnc - update to 1.13.1-11.fc39
xorg-x11-server - addressed in versions 1.17.4-18.56, 1.20.14-30
xorg-x11-server-sdk - addressed in versions 1.19.6-10.65.1, 1.20.3-150200.22.5.88.1, 1.20.3-150400.38.40.1, 21.1.4-150500.7.18.1
xorg-x11-server - addressed in versions 1.19.6-10.65.1, 1.20.3-150200.22.5.88.1, 1.20.3-150400.38.40.1, 21.1.4-150500.7.18.1
xorg-x11-server-debuginfo - addressed in versions 1.19.6-10.65.1, 1.20.3-150200.22.5.88.1, 1.20.3-150400.38.40.1, 21.1.4-150500.7.18.1
xorg-x11-server-debugsource - addressed in versions 1.19.6-10.65.1, 1.20.3-150200.22.5.88.1, 1.20.3-150400.38.40.1, 21.1.4-150500.7.18.1
xorg-x11-server-extra-debuginfo - addressed in versions 1.19.6-10.65.1, 1.20.3-150200.22.5.88.1, 1.20.3-150400.38.40.1, 21.1.4-150500.7.18.1
xorg-x11-server-extra - addressed in versions 1.19.6-10.65.1, 1.20.3-150200.22.5.88.1, 1.20.3-150400.38.40.1, 21.1.4-150500.7.18.1
xorg-x11-server-wayland - update to 1.20.3-150200.22.5.88.1
xorg-x11-server-wayland-debuginfo - update to 1.20.3-150200.22.5.88.1
xorg-x11-server-source - addressed in versions 1.20.3-150400.38.40.1, 21.1.4-150500.7.18.1
xorg-x11-server-Xnest - addressed in versions 1.20.4-27, 1.20.14-17
xorg-x11-server-Xorg - addressed in versions 1.20.4-27, 1.20.14-17
xorg-x11-server-Xvfb - addressed in versions 1.20.4-27, 1.20.14-17
xorg-x11-server-source - addressed in versions 1.20.4-27, 1.20.14-17
xorg-x11-server-Xdmx - addressed in versions 1.20.4-27, 1.20.14-17
xorg-x11-server-Xephyr - addressed in versions 1.20.4-27, 1.20.14-17
xorg-x11-server-Xwayland - addressed in versions 1.20.4-27, 22.1.9-5
xorg-x11-server-common - addressed in versions 1.20.4-27, 1.20.14-17
xorg-x11-server-devel - addressed in versions 1.20.4-27, 1.20.14-17
xorg-x11-server (Red Hat package) - addressed in versions 1.20.4-27.el7_9, 1.20.11-24.el9
xorg-x11-server - update to 1.20.8-23
xorg-x11-server-devel - update to 1.20.8-23
xorg-x11-server-debugsource - update to 1.20.8-23
xorg-x11-server-debuginfo - update to 1.20.8-23
xorg-x11-server-Xephyr - update to 1.20.8-23
xorg-x11-server-help - update to 1.20.8-23
xorg-server (Debian package) - addressed in versions 2:1.20.11-1+deb11u11, 2:21.1.7-3+deb12u5
xorg-server-xvfb - update to 1.20.14
xorg-server-xnest - update to 1.20.14
xorg-server-xephyr - update to 1.20.14
xorg-server - update to 1.20.14
xorg-x11-server - update to 1.20.14-29.fc39
xorg-x11-server-Xwayland (Red Hat package) - addressed in versions 21.1.3-15.el8, 22.1.9-5.el9
xorg-server-xwayland - update to 21.1.4
xwayland-debugsource - addressed in versions 21.1.4-150400.3.31.1, 22.1.5-150500.7.14.1
xwayland-devel - addressed in versions 21.1.4-150400.3.31.1, 22.1.5-150500.7.14.1
xwayland-debuginfo - addressed in versions 21.1.4-150400.3.31.1, 22.1.5-150500.7.14.1
xwayland - addressed in versions 21.1.4-150400.3.31.1, 22.1.5-150500.7.14.1
xorg-x11-server-Xvfb-debuginfo - update to 21.1.4-150500.7.18.1
xorg-x11-server-Xvfb - update to 21.1.4-150500.7.18.1
x11-base/xorg-server - update to 21.1.11
xorg-x11-server-Xwayland-debuginfo - update to 22.1.2-4
xorg-x11-server-Xwayland-debugsource - update to 22.1.2-4
xorg-x11-server-Xwayland-devel - update to 22.1.2-4
xorg-x11-server-Xwayland - update to 22.1.2-4
xorg-x11-server-Xwayland - addressed in versions 22.1.9-5.fc38, 23.2.4-1.fc39
x11-base/xwayland - update to 23.2.4

External References

Related Security Bulletins