Use-after-free in X.org Server - CVE-2023-0494

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Main Vulnerability Database Vulnerabilities #VU71991

Use-after-free in X.org Server - CVE-2023-0494

Published: February 7, 2023 / Updated: February 13, 2023


Vulnerability identifier: #VU71991
CSH Severity: Low
CVSS v4: 9.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H]
CVE-ID: CVE-2023-0494
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 within DeepCopyPointerClasses. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


Affected software

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

How to mitigate CVE-2023-0494

Install updates from vendor's website.

X.org Server - update to 21.1.7
xwayland-hwe-16.04 (Ubuntu package) - update to Ubuntu Pro
xserver-xorg-core-hwe-16.04 (Ubuntu package) - update to Ubuntu Pro (Infra-only)
xserver-xorg-core (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 2:1.19.6-1ubuntu4.14, 2:1.20.13-1ubuntu1~20.04.6, 2:21.1.3-2ubuntu2.7, 2:21.1.4-2ubuntu1.5
xwayland (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 2:1.19.6-1ubuntu4.14, 2:1.20.13-1ubuntu1~20.04.6, 2:22.1.1-1ubuntu0.5, 2:22.1.3-2ubuntu0.3
tigervnc (Red Hat package) - addressed in versions 1.1.0-25.el6_10.13, 1.8.0-24.el7_9, 1.9.0-15.el8_2.1, 1.9.0-16.el8_1.1, 1.11.0-8.el8_4.1, 1.11.0-22.el9_0.1, 1.12.0-5.el9_1.1, 1.12.0-6.el8_6.1, 1.12.0-9.el8_7.1
tigervnc - update to 1.8.0-21.35
tigervnc-server-applet - update to 1.8.0-24
tigervnc-license - addressed in versions 1.8.0-24, 1.12.0-9
tigervnc-icons - addressed in versions 1.8.0-24, 1.12.0-9
tigervnc-server-module - addressed in versions 1.8.0-24, 1.12.0-9
tigervnc-server-minimal - addressed in versions 1.8.0-24, 1.12.0-9
tigervnc-server - addressed in versions 1.8.0-24, 1.12.0-9
tigervnc - addressed in versions 1.8.0-24, 1.12.0-9
tigervnc - addressed in versions 1.12.0, 1.13.1
tigervnc-selinux - update to 1.12.0-9
tigervnc - addressed in versions 1.13.0-1.fc37, 1.13.1-1.fc36
xorg-x11-server - addressed in versions 1.17.4-18.51, 1.20.14-18
xorg-x11-server - addressed in versions 1.19.6-4.42.1, 1.19.6-10.43.1, 1.20.3-150100.14.5.36.1, 1.20.3-150200.22.5.66.1, 1.20.3-150400.38.16.1, 7.6_1.18.3-76.60.1
xorg-x11-server-extra-debuginfo - addressed in versions 1.19.6-4.42.1, 1.19.6-10.43.1, 1.20.3-150100.14.5.36.1, 1.20.3-150200.22.5.66.1, 1.20.3-150400.38.16.1, 7.6_1.18.3-76.60.1
xorg-x11-server-extra - addressed in versions 1.19.6-4.42.1, 1.19.6-10.43.1, 1.20.3-150100.14.5.36.1, 1.20.3-150200.22.5.66.1, 1.20.3-150400.38.16.1, 7.6_1.18.3-76.60.1
xorg-x11-server-debugsource - addressed in versions 1.19.6-4.42.1, 1.19.6-10.43.1, 1.20.3-150100.14.5.36.1, 1.20.3-150200.22.5.66.1, 1.20.3-150400.38.16.1, 7.6_1.18.3-76.60.1
xorg-x11-server-debuginfo - addressed in versions 1.19.6-4.42.1, 1.19.6-10.43.1, 1.20.3-150100.14.5.36.1, 1.20.3-150200.22.5.66.1, 1.20.3-150400.38.16.1, 7.6_1.18.3-76.60.1
xorg-x11-server-sdk - addressed in versions 1.19.6-10.43.1, 1.20.3-150100.14.5.36.1, 1.20.3-150200.22.5.66.1, 1.20.3-150400.38.16.1
xorg-x11-server-wayland - update to 1.20.3-150200.22.5.66.1
xorg-x11-server-wayland-debuginfo - update to 1.20.3-150200.22.5.66.1
xorg-x11-server-source - update to 1.20.3-150400.38.16.1
xorg-x11-server-devel - addressed in versions 1.20.4-22, 1.20.11-15.0.1
xorg-x11-server-common - addressed in versions 1.20.4-22, 1.20.11-15.0.1
xorg-x11-server-Xwayland - addressed in versions 1.20.4-22, 21.1.3-7
xorg-x11-server-Xvfb - addressed in versions 1.20.4-22, 1.20.11-15.0.1
xorg-x11-server-Xorg - addressed in versions 1.20.4-22, 1.20.11-15.0.1
xorg-x11-server-Xnest - addressed in versions 1.20.4-22, 1.20.11-15.0.1
xorg-x11-server-Xephyr - addressed in versions 1.20.4-22, 1.20.11-15.0.1
xorg-x11-server-Xdmx - addressed in versions 1.20.4-22, 1.20.11-15.0.1
xorg-x11-server-source - addressed in versions 1.20.4-22, 1.20.11-15.0.1
xorg-x11-server (Red Hat package) - addressed in versions 1.20.4-22.el7_9, 1.20.11-15.el8, 1.20.11-17.el9
xserver-xorg-core-hwe-18.04 (Ubuntu package) - update to 2:1.20.8-2ubuntu2.2~18.04.10
xwayland-hwe-18.04 (Ubuntu package) - update to 2:1.20.8-2ubuntu2.2~18.04.10
xorg-x11-server - update to 1.20.8-16
xorg-x11-server-Xephyr - update to 1.20.8-16
xorg-x11-server-devel - update to 1.20.8-16
xorg-x11-server-debuginfo - update to 1.20.8-16
xorg-x11-server-debugsource - update to 1.20.8-16
xorg-x11-server-help - update to 1.20.8-16
xorg-server (Debian package) - update to 2:1.20.11-1+deb11u5
xorg-x11-server-doc - update to 1.20.11-15.0.1
xorg-server-xephyr - update to 1.20.14
xorg-server - 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 1.20.14-18.fc36, 1.20.14-18.fc37
xorg-x11-server-Xwayland (Red Hat package) - addressed in versions 21.1.3-7.el9, 21.1.3-10.el8
xorg-server-xwayland - update to 21.1.4
xwayland - update to 21.1.4-150400.3.9.1
xwayland-debuginfo - update to 21.1.4-150400.3.9.1
xwayland-debugsource - update to 21.1.4-150400.3.9.1
xwayland-devel - update to 21.1.4-150400.3.9.1
x11-base/xorg-server - update to 21.1.8
xorg-x11-server-Xwayland - addressed in versions 22.1.8-1.fc36, 22.1.8-1.fc37
x11-base/xwayland - update to 23.1.1

External References

Related Security Bulletins