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CVE-2023-5574

Public on 2023-10-25
Modified on 2024-01-16
Description

A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with 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 a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service.

Severity
Important
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CVSS v3 Base Score
7.0
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 xorg-x11-server 2023-11-29 23:18 ALAS-2023-1892
Amazon Linux 2 - Core xorg-x11-server 2023-11-29 22:19 ALAS2-2023-2352
Amazon Linux 2023 xorg-x11-server 2023-12-06 07:45 ALAS2023-2023-444

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD CVSSv3 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H