Summary
Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
prepending values to certain properties. An attacker could possibly use
this issue to cause the X Server to crash, execute arbitrary code, or
escalate privileges. (CVE-2023-5367)
Sri discovered that the X.Org X Server incorrectly handled detroying
windows in certain legacy multi-screen setups. An attacker could possibly
use this issue to cause the X Server to crash, execute arbitrary code, or
escalate privileges. (CVE-2023-5380)
Fixed packages 3
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 20.04 LTS 20.04:LTS | xorg-server | 2:1.20.13-1ubuntu1~20.04.9 |
| Ubuntu · 22.04 LTS 22.04:LTS | xorg-server | 2:21.1.4-2ubuntu1.7~22.04.2 |
| Ubuntu · 22.04 LTS 22.04:LTS | xwayland | 2:22.1.1-1ubuntu0.7 |
Vulnerabilities 2
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High 7.8
Xorg-x11-server: out-of-bounds write in xichangedeviceproperty/rrchangeoutputproperty
A out-of-bounds write flaw was found in the xorg-x11-server. This issue occurs due to an incorrect calculation of a buffer offset when copying data stored in the heap in the XIChangeDeviceProperty function in Xi/xiproperty.c and in RRChangeOutputProperty func…
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Medium 4.7
Xorg-x11-server: use-after-free bug in destroywindow
A use-after-free flaw was found in the xorg-x11-server. An X server crash may occur in a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode) if the pointer is warped from within a window on o…