Use-after-free in X.org Server - CVE-2022-4283

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Main Vulnerability Database Vulnerabilities #VU70438

Use-after-free in X.org Server - CVE-2022-4283

Published: December 20, 2022 / Updated: January 9, 2023


Vulnerability identifier: #VU70438
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-2022-4283
CWE-ID: CWE-416
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 use-after-free error when handling XkbCopyNames requests. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Affected software

X.org Server
Amazon Linux AMI
Gentoo Linux
Debian Linux
Oracle Linux
SUSE CaaS Platform
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Manager Server
SUSE Enterprise Storage
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Scientific Computing
CentOS
Anolis OS
Red Hat Enterprise Linux for x86_64
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 CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for IBM z Systems
SUSE OpenStack Cloud
SUSE OpenStack Cloud Crowbar
Oracle Solaris
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise Software Development Kit
SUSE Linux Enterprise Server for SAP Applications
Ubuntu
Slackware Linux
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Development Tools
SUSE Linux Enterprise Desktop
SUSE Linux Enterprise Workstation Extension
openSUSE Leap
openEuler
Fedora
xserver-xorg-core (Ubuntu package)
xwayland (Ubuntu package)
xwayland-hwe-16.04 (Ubuntu package)
xserver-xorg-core-hwe-16.04 (Ubuntu package)
tigervnc (Red Hat package)
tigervnc
tigervnc-server
tigervnc-server-minimal
tigervnc-server-module
tigervnc-icons
tigervnc-license
tigervnc-server-applet
tigervnc-selinux
xorg-x11-server
xorg-x11-server-extra
xorg-x11-server-debuginfo
xorg-x11-server-debugsource
xorg-x11-server-extra-debuginfo
xorg-x11-server-sdk
xorg-x11-server-source
xorg-x11-server-wayland-debuginfo
xorg-x11-server-wayland
xorg-x11-server-devel
xorg-x11-server-common
xorg-x11-server-Xwayland
xorg-x11-server-Xvfb
xorg-x11-server-Xorg
xorg-x11-server-Xnest
xorg-x11-server-Xephyr
xorg-x11-server-Xdmx
xorg-x11-server (Red Hat package)
xorg-x11-server-help
xorg-x11-server-doc
xorg-x11-server-Xwayland (Red Hat package)
xwayland-devel
xwayland-debugsource
xwayland-debuginfo
xwayland
x11-base/xorg-server
x11-base/xwayland
xorg-server-xvfb
xorg-server-xnest
xorg-server-xephyr
xorg-server
xorg-server-xwayland
xserver-xorg-core-hwe-18.04 (Ubuntu package)
xwayland-hwe-18.04 (Ubuntu package)
xorg-server (Debian package)

How to mitigate CVE-2022-4283

Install updates from vendor's website.

X.org Server - update to 21.1.5
xserver-xorg-core (Ubuntu package) - addressed in versions 2:1.15.1-0ubuntu2.11+esm7, 2:1.18.4-0ubuntu0.12+esm5, 2:1.19.6-1ubuntu4.13, 2:1.20.13-1ubuntu1~20.04.5, 2:21.1.3-2ubuntu2.5, 2:21.1.4-2ubuntu1.3
xwayland (Ubuntu package) - addressed in versions 2:1.18.4-0ubuntu0.12+esm5, 2:1.19.6-1ubuntu4.13, 2:1.20.13-1ubuntu1~20.04.5, 2:22.1.1-1ubuntu0.4, 2:22.1.3-2ubuntu0.2
xwayland-hwe-16.04 (Ubuntu package) - update to 2:1.19.6-1ubuntu4.1~16.04.6+esm4
xserver-xorg-core-hwe-16.04 (Ubuntu package) - update to 2:1.19.6-1ubuntu4.1~16.04.6+esm4
tigervnc (Red Hat package) - addressed in versions 1.1.0-25.el6_10.13, 1.8.0-23.el7_9, 1.12.0-13.el9_2, 1.12.0-15.el8_8
tigervnc - addressed in versions 1.8.0-23, 1.12.0-15
tigervnc-server - addressed in versions 1.8.0-23, 1.12.0-15
tigervnc-server-minimal - addressed in versions 1.8.0-23, 1.12.0-15
tigervnc-server-module - addressed in versions 1.8.0-23, 1.12.0-15
tigervnc-icons - addressed in versions 1.8.0-23, 1.12.0-15
tigervnc-license - addressed in versions 1.8.0-23, 1.12.0-15
tigervnc-server-applet - update to 1.8.0-23
tigervnc-selinux - update to 1.12.0-15
xorg-x11-server - addressed in versions 1.17.4-18.50, 1.20.14-12
xorg-x11-server-extra - addressed in versions 1.19.6-4.39.1, 1.19.6-10.40.1, 1.19.6-150000.8.47.1, 1.20.3-150100.14.5.33.1, 1.20.3-150200.22.5.63.1, 1.20.3-150400.38.13.1, 7.6_1.18.3-76.57.1
xorg-x11-server - addressed in versions 1.19.6-4.39.1, 1.19.6-10.40.1, 1.19.6-150000.8.47.1, 1.20.3-150100.14.5.33.1, 1.20.3-150200.22.5.63.1, 1.20.3-150400.38.13.1, 7.6_1.18.3-76.57.1
xorg-x11-server-debuginfo - addressed in versions 1.19.6-4.39.1, 1.19.6-10.40.1, 1.19.6-150000.8.47.1, 1.20.3-150100.14.5.33.1, 1.20.3-150200.22.5.63.1, 1.20.3-150400.38.13.1, 7.6_1.18.3-76.57.1
xorg-x11-server-debugsource - addressed in versions 1.19.6-4.39.1, 1.19.6-10.40.1, 1.19.6-150000.8.47.1, 1.20.3-150100.14.5.33.1, 1.20.3-150200.22.5.63.1, 1.20.3-150400.38.13.1, 7.6_1.18.3-76.57.1
xorg-x11-server-extra-debuginfo - addressed in versions 1.19.6-4.39.1, 1.19.6-10.40.1, 1.19.6-150000.8.47.1, 1.20.3-150100.14.5.33.1, 1.20.3-150200.22.5.63.1, 1.20.3-150400.38.13.1, 7.6_1.18.3-76.57.1
xorg-x11-server-sdk - addressed in versions 1.19.6-10.40.1, 1.19.6-150000.8.47.1, 1.20.3-150100.14.5.33.1, 1.20.3-150200.22.5.63.1, 1.20.3-150400.38.13.1
xorg-x11-server-source - addressed in versions 1.20.3-150200.22.5.63.1, 1.20.3-150400.38.13.1
xorg-x11-server-wayland-debuginfo - update to 1.20.3-150200.22.5.63.1
xorg-x11-server-wayland - update to 1.20.3-150200.22.5.63.1
xorg-x11-server-source - addressed in versions 1.20.4-21, 1.20.11-15.0.1
xorg-x11-server-devel - addressed in versions 1.20.4-21, 1.20.11-15.0.1
xorg-x11-server-common - addressed in versions 1.20.4-21, 1.20.11-15.0.1
xorg-x11-server-Xwayland - addressed in versions 1.20.4-21, 21.1.3-7
xorg-x11-server-Xvfb - addressed in versions 1.20.4-21, 1.20.11-15.0.1
xorg-x11-server-Xorg - addressed in versions 1.20.4-21, 1.20.11-15.0.1
xorg-x11-server-Xnest - addressed in versions 1.20.4-21, 1.20.11-15.0.1
xorg-x11-server-Xephyr - addressed in versions 1.20.4-21, 1.20.11-15.0.1
xorg-x11-server-Xdmx - addressed in versions 1.20.4-21, 1.20.11-15.0.1
xorg-x11-server (Red Hat package) - addressed in versions 1.20.4-21.el7_9, 1.20.11-15.el8, 1.20.11-17.el9
xorg-x11-server - update to 1.20.8-13
xorg-x11-server-debuginfo - update to 1.20.8-13
xorg-x11-server-help - update to 1.20.8-13
xorg-x11-server-devel - update to 1.20.8-13
xorg-x11-server-debugsource - update to 1.20.8-13
xorg-x11-server-Xephyr - update to 1.20.8-13
xorg-x11-server-doc - update to 1.20.11-15.0.1
xorg-x11-server - addressed in versions 1.20.14-11.fc36, 1.20.14-11.fc37, 1.20.14-12.fc36
xorg-x11-server-Xwayland (Red Hat package) - addressed in versions 21.1.3-7.el9, 21.1.3-10.el8
xwayland-devel - update to 21.1.4-150400.3.6.1
xwayland-debugsource - update to 21.1.4-150400.3.6.1
xwayland-debuginfo - update to 21.1.4-150400.3.6.1
xwayland - update to 21.1.4-150400.3.6.1
xorg-x11-server-Xwayland - addressed in versions 22.1.6-1.fc36, 22.1.6-1.fc37
x11-base/xorg-server - update to 21.1.8
x11-base/xwayland - update to 23.1.1
tigervnc - addressed in versions 1.12.0, 1.13.1
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-server-xwayland - update to 21.1.4
xserver-xorg-core-hwe-18.04 (Ubuntu package) - update to 2:1.20.8-2ubuntu2.2~18.04.9
xwayland-hwe-18.04 (Ubuntu package) - update to 2:1.20.8-2ubuntu2.2~18.04.9
xorg-server (Debian package) - update to 2:1.20.11-1+deb11u4

External References

Related Security Bulletins