Issue Overview:
A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions. (CVE-2023-0494)
Affected Packages:
xorg-x11-server
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update xorg-x11-server to update your system.
New Packages:
aarch64:
xorg-x11-server-common-1.20.4-22.amzn2.aarch64
xorg-x11-server-Xorg-1.20.4-22.amzn2.aarch64
xorg-x11-server-Xnest-1.20.4-22.amzn2.aarch64
xorg-x11-server-Xdmx-1.20.4-22.amzn2.aarch64
xorg-x11-server-Xvfb-1.20.4-22.amzn2.aarch64
xorg-x11-server-Xephyr-1.20.4-22.amzn2.aarch64
xorg-x11-server-Xwayland-1.20.4-22.amzn2.aarch64
xorg-x11-server-devel-1.20.4-22.amzn2.aarch64
xorg-x11-server-debuginfo-1.20.4-22.amzn2.aarch64
i686:
xorg-x11-server-common-1.20.4-22.amzn2.i686
xorg-x11-server-Xorg-1.20.4-22.amzn2.i686
xorg-x11-server-Xnest-1.20.4-22.amzn2.i686
xorg-x11-server-Xdmx-1.20.4-22.amzn2.i686
xorg-x11-server-Xvfb-1.20.4-22.amzn2.i686
xorg-x11-server-Xephyr-1.20.4-22.amzn2.i686
xorg-x11-server-Xwayland-1.20.4-22.amzn2.i686
xorg-x11-server-devel-1.20.4-22.amzn2.i686
xorg-x11-server-debuginfo-1.20.4-22.amzn2.i686
noarch:
xorg-x11-server-source-1.20.4-22.amzn2.noarch
src:
xorg-x11-server-1.20.4-22.amzn2.src
x86_64:
xorg-x11-server-common-1.20.4-22.amzn2.x86_64
xorg-x11-server-Xorg-1.20.4-22.amzn2.x86_64
xorg-x11-server-Xnest-1.20.4-22.amzn2.x86_64
xorg-x11-server-Xdmx-1.20.4-22.amzn2.x86_64
xorg-x11-server-Xvfb-1.20.4-22.amzn2.x86_64
xorg-x11-server-Xephyr-1.20.4-22.amzn2.x86_64
xorg-x11-server-Xwayland-1.20.4-22.amzn2.x86_64
xorg-x11-server-devel-1.20.4-22.amzn2.x86_64
xorg-x11-server-debuginfo-1.20.4-22.amzn2.x86_64
Red Hat: CVE-2023-0494
Mitre: CVE-2023-0494