Out-of-bounds write in X.org Server and Xwayland - CVE-2023-6377

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Main Vulnerability Database Vulnerabilities #VU84372

Out-of-bounds write in X.org Server and Xwayland - CVE-2023-6377

Published: December 13, 2023 / Updated: January 5, 2024


Vulnerability identifier: #VU84372
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-2023-6377
CWE-ID: CWE-787
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 in the XKB button handler when switching logical input devices. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.


Affected software

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

How to mitigate CVE-2023-6377

Install updates from vendor's website.

X.org Server - update to 21.1.10
Xwayland - update to 23.2.3
xserver-xorg-core (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 2:1.20.13-1ubuntu1~20.04.12, 2:21.1.4-2ubuntu1.7~22.04.5, 2:21.1.7-1ubuntu3.4, 2:21.1.7-3ubuntu2.4
xwayland (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 2:1.20.13-1ubuntu1~20.04.12, 2:22.1.1-1ubuntu0.9, 2:22.1.8-1ubuntu1.3, 2:23.2.0-1ubuntu0.3
xorg-x11-drv-qxl - update to 0.1.6-5.fc42
xorg-x11-drv-dummy - update to 0.4.1-4.fc42
xorg-x11-drv-fbdev - update to 0.5.0-17.fc42
xorg-x11-drv-openchrome - update to 0.6.400-9.20210215git5dbad06.fc42
xorgxrdp - update to 0.10.2-2.fc42
xorg-x11-drv-nouveau - update to 1.0.17-10.fc42
tigervnc (Red Hat package) - addressed in versions 1.1.0-25.el6_10.14, 1.8.0-28.el7_9, 1.9.0-15.el8_2.6, 1.11.0-8.el8_4.5, 1.11.0-22.el9_0.5, 1.12.0-6.el8_6.6, 1.12.0-14.el9_2.2, 1.12.0-15.el8_8.4, 1.13.1-2.el8_9.4, 1.13.1-3.el9_3.3
tigervnc - addressed in versions 1.8.0-28, 1.12.0-18
tigervnc-license - addressed in versions 1.8.0-28, 1.12.0-18
tigervnc-server-applet - update to 1.8.0-28
tigervnc-icons - addressed in versions 1.8.0-28, 1.12.0-18
tigervnc-server-module - addressed in versions 1.8.0-28, 1.12.0-18
tigervnc-server-minimal - addressed in versions 1.8.0-28, 1.12.0-18
tigervnc-server - addressed in versions 1.8.0-28, 1.12.0-18
tigervnc - addressed in versions 1.12.0, 1.13.1
tigervnc-selinux - update to 1.12.0-18
tigervnc - update to 1.14.0-6.fc42
xorg-x11-server - addressed in versions 1.17.4-18.54, 1.20.14-30
xorg-x11-server-extra - addressed in versions 1.19.6-10.59.1, 1.19.6-10.62.1, 1.20.3-150200.22.5.82.1, 1.20.3-150200.22.5.85.1, 1.20.3-150400.38.32.1, 1.20.3-150400.38.35.1, 21.1.4-150500.7.10.1, 21.1.4-150500.7.13.1
xorg-x11-server-extra-debuginfo - addressed in versions 1.19.6-10.59.1, 1.19.6-10.62.1, 1.20.3-150200.22.5.82.1, 1.20.3-150200.22.5.85.1, 1.20.3-150400.38.32.1, 1.20.3-150400.38.35.1, 21.1.4-150500.7.10.1, 21.1.4-150500.7.13.1
xorg-x11-server - addressed in versions 1.19.6-10.59.1, 1.19.6-10.62.1, 1.20.3-150200.22.5.82.1, 1.20.3-150200.22.5.85.1, 1.20.3-150400.38.32.1, 1.20.3-150400.38.35.1, 21.1.4-150500.7.10.1, 21.1.4-150500.7.13.1
xorg-x11-server-debuginfo - addressed in versions 1.19.6-10.59.1, 1.19.6-10.62.1, 1.20.3-150200.22.5.82.1, 1.20.3-150200.22.5.85.1, 1.20.3-150400.38.32.1, 1.20.3-150400.38.35.1, 21.1.4-150500.7.10.1, 21.1.4-150500.7.13.1
xorg-x11-server-debugsource - addressed in versions 1.19.6-10.59.1, 1.19.6-10.62.1, 1.20.3-150200.22.5.82.1, 1.20.3-150200.22.5.85.1, 1.20.3-150400.38.32.1, 1.20.3-150400.38.35.1, 21.1.4-150500.7.10.1, 21.1.4-150500.7.13.1
xorg-x11-server-sdk - addressed in versions 1.19.6-10.59.1, 1.19.6-10.62.1, 1.20.3-150200.22.5.82.1, 1.20.3-150200.22.5.85.1, 1.20.3-150400.38.32.1, 1.20.3-150400.38.35.1, 21.1.4-150500.7.10.1, 21.1.4-150500.7.13.1
xorg-x11-server-wayland - addressed in versions 1.20.3-150200.22.5.82.1, 1.20.3-150200.22.5.85.1
xorg-x11-server-wayland-debuginfo - addressed in versions 1.20.3-150200.22.5.82.1, 1.20.3-150200.22.5.85.1
xorg-x11-server-source - addressed in versions 1.20.3-150400.38.32.1, 1.20.3-150400.38.35.1, 21.1.4-150500.7.10.1, 21.1.4-150500.7.13.1
xorg-x11-server-Xdmx - addressed in versions 1.20.4-25, 1.20.11-16.0.5
xorg-x11-server-Xephyr - addressed in versions 1.20.4-25, 1.20.11-16.0.5
xorg-x11-server-Xnest - addressed in versions 1.20.4-25, 1.20.11-16.0.5
xorg-x11-server-Xorg - addressed in versions 1.20.4-25, 1.20.11-16.0.5
xorg-x11-server-Xvfb - addressed in versions 1.20.4-25, 1.20.11-16.0.5
xorg-x11-server-Xwayland - addressed in versions 1.20.4-25, 22.1.9-5
xorg-x11-server-common - addressed in versions 1.20.4-25, 1.20.11-16.0.5
xorg-x11-server-devel - addressed in versions 1.20.4-25, 1.20.11-16.0.5
xorg-x11-server-source - addressed in versions 1.20.4-25, 1.20.11-16.0.5
xorg-x11-server (Red Hat package) - addressed in versions 1.20.4-25.el7_9, 1.20.11-22.el8, 1.20.11-24.el9
xorg-x11-server-debugsource - update to 1.20.8-22
xorg-x11-server-debuginfo - update to 1.20.8-22
xorg-x11-server - update to 1.20.8-22
xorg-x11-server-Xephyr - update to 1.20.8-22
xorg-x11-server-help - update to 1.20.8-22
xorg-x11-server-devel - update to 1.20.8-22
xorg-server (Debian package) - addressed in versions 2:1.20.11-1+deb11u9, 2:1.20.11-1+deb11u10, 2:21.1.7-3+deb12u3, 2:21.1.7-3+deb12u4
xorg-x11-server-doc - update to 1.20.11-16.0.5
xorg-server - update to 1.20.14
xorg-server-xephyr - update to 1.20.14
xorg-server-xnest - update to 1.20.14
xorg-server-xvfb - update to 1.20.14
xorg-x11-server - addressed in versions 1.20.14-28.fc38, 1.20.14-28.fc39, 21.1.13-3.fc42
xorg-x11-drv-vesa - update to 2.6.0-1.fc42
xorg-x11-drv-intel - update to 2.99.917-59.20210115.fc42
xorg-x11-drv-vmware - update to 13.4.0-6.fc42
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-devel - addressed in versions 21.1.4-150400.3.23.1, 21.1.4-150400.3.26.1, 22.1.5-150500.7.8.1, 22.1.5-150500.7.11.1
xwayland-debugsource - addressed in versions 21.1.4-150400.3.23.1, 21.1.4-150400.3.26.1, 22.1.5-150500.7.8.1, 22.1.5-150500.7.11.1
xwayland-debuginfo - addressed in versions 21.1.4-150400.3.23.1, 21.1.4-150400.3.26.1, 22.1.5-150500.7.8.1, 22.1.5-150500.7.11.1
xwayland - addressed in versions 21.1.4-150400.3.23.1, 21.1.4-150400.3.26.1, 22.1.5-150500.7.8.1, 22.1.5-150500.7.11.1
xorg-x11-server-Xvfb - addressed in versions 21.1.4-150500.7.10.1, 21.1.4-150500.7.13.1
xorg-x11-server-Xvfb-debuginfo - addressed in versions 21.1.4-150500.7.10.1, 21.1.4-150500.7.13.1
x11-base/xorg-server - update to 21.1.11
xorg-x11-drv-ati - update to 22.0.0-2.fc42
xorg-x11-server-Xwayland-debuginfo - update to 22.1.2-6
xorg-x11-server-Xwayland-debugsource - update to 22.1.2-6
xorg-x11-server-Xwayland-devel - update to 22.1.2-6
xorg-x11-server-Xwayland - update to 22.1.2-6
xorg-x11-server-Xwayland - addressed in versions 22.1.9-4.fc38, 23.2.3-1.fc39
xorg-x11-drv-amdgpu - update to 23.0.0-6.fc42
x11-base/xwayland - update to 23.2.4

External References

Related Security Bulletins