Slackware Linux update for xorg-server

Published: 2023-10-26

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-5367 CVE-2023-5380
CWE-ID	CWE-787 CWE-416
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Slackware Linux Operating systems & Components / Operating system xorg-server-xvfb Operating systems & Components / Operating system package or component xorg-server-xnest Operating systems & Components / Operating system package or component xorg-server-xephyr Operating systems & Components / Operating system package or component xorg-server Operating systems & Components / Operating system package or component xorg-server-xwayland Operating systems & Components / Operating system package or component
Vendor	Slackware

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU82380

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-5367

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in IChangeDeviceProperty/RRChangeOutputProperty. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package xorg-server.

Vulnerable software versions

Slackware Linux: 15.0

xorg-server-xvfb: before 1.20.14

xorg-server-xnest: before 1.20.14

xorg-server-xephyr: before 1.20.14

xorg-server: before 1.20.14

xorg-server-xwayland: before 21.1.4

External links

http://www.slackware.com/security/viewer.php?l=slackware-security&y=2023&m=slackware-security.662795

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU82381