Ubuntu update for xorg-server

Published: 2023-10-25

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	Ubuntu Operating systems & Components / Operating system xwayland (Ubuntu package) Operating systems & Components / Operating system package or component xserver-xorg-core (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU82380

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

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 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.10

xwayland (Ubuntu package): before 2:1.20.13-1ubuntu1~20.04.9

xserver-xorg-core (Ubuntu package): before 2:1.20.13-1ubuntu1~20.04.9

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6453-1

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