Slackware Linux 15.0 / current xorg-server Multiple Vulnerabilities (SSA:2023-299-02)

high Nessus Plugin ID 183928


The remote Slackware Linux host is missing a security update to xorg-server.


The version of xorg-server installed on the remote host is prior to 1.20.14 / 21.1.4 / 21.1.9 / 23.2.2. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2023-299-02 advisory.

- 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 function in randr/rrproperty.c, allowing for possible escalation of privileges or denial of service. (CVE-2023-5367)

- 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 one screen to the root window of the other screen and if the original window is destroyed followed by another window being destroyed. (CVE-2023-5380)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Upgrade the affected xorg-server package.

See Also

Plugin Details

Severity: High

ID: 183928

File Name: Slackware_SSA_2023-299-02.nasl

Version: 1.1

Type: local

Published: 10/26/2023

Updated: 11/3/2023

Supported Sensors: Nessus

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2023-5367


Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:slackware:slackware_linux:xorg-server-xwayland, cpe:/o:slackware:slackware_linux:15.0, p-cpe:/a:slackware:slackware_linux:xorg-server-xvfb, p-cpe:/a:slackware:slackware_linux:xorg-server, p-cpe:/a:slackware:slackware_linux:xorg-server-xnest, p-cpe:/a:slackware:slackware_linux:xorg-server-xephyr, cpe:/o:slackware:slackware_linux

Required KB Items: Host/local_checks_enabled, Host/Slackware/release, Host/Slackware/packages

Exploit Ease: No known exploits are available

Patch Publication Date: 10/26/2023

Vulnerability Publication Date: 10/25/2023

Reference Information

CVE: CVE-2023-5367, CVE-2023-5380