Use After Free Affecting tigervnc-server-debuginfo package, versions <0:1.12.0-5.el9_1.2


Severity

Recommended
0.0
high
0
10

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.06% (20th percentile)

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  • Snyk IDSNYK-ROCKY9-TIGERVNCSERVERDEBUGINFO-5415514
  • published7 Apr 2023
  • disclosed30 Mar 2023

Introduced: 30 Mar 2023

CVE-2023-1393  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 tigervnc-server-debuginfo to version 0:1.12.0-5.el9_1.2 or higher.
This issue was patched in RLSA-2023:1592.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tigervnc-server-debuginfo package and not the tigervnc-server-debuginfo package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.

References

CVSS Base Scores

version 3.1