Debian update for xorg-server

Published: 2023-12-13

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-6377 CVE-2023-6478
CWE-ID	CWE-787 CWE-190
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Debian Linux Operating systems & Components / Operating system xorg-server (Debian package) Operating systems & Components / Operating system package or component
Vendor	Debian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU84372

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-2023-6377

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 the XKB button handler when switching logical input devices. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update xorg-server package to one of the following versions: 2:1.20.11-1+deb11u9, 2:21.1.7-3+deb12u3.

Vulnerable software versions

Debian Linux: All versions

xorg-server (Debian package): before 2:21.1.7-3+deb12u3

External links

http://www.debian.org/security/2023/dsa-5576

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) Integer overflow

EUVDB-ID: #VU84373