Debian update for xorg-server



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
 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 2:1.20.11-1+deb11u9

CPE2.3 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

Risk: Low

CVSSv3.1: 3.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-6478

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to integer overflow when handling RRChangeProviderProperty or RRChangeOutputProperty requests. A local user can send a specially crafted request to the server, trigger an integer overflow and gain access to sensitive information.

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 2:1.20.11-1+deb11u9

CPE2.3 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.



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