#VU88116 Heap-based buffer overflow in X.org Server and Xwayland - CVE-2024-31081

Vulnerability identifier: #VU88116

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-31081

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
X.org Server
Server applications / Other server solutions
Xwayland
Client/Desktop applications / Multimedia software

Vendor: X.org

Description

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

The vulnerability exists due to a boundary error within the ProcXIPassiveGrabDevice() function. A local user can trigger a heap-based buffer overflow and read system memory.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

X.org Server: 21.0.99.1 - 21.1.11

Xwayland: 23.0.99.901 - 23.2.4

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External links
http://lists.x.org/archives/xorg-announce/2024-April/003497.html
http://gitlab.freedesktop.org/xorg/xserver/-/commit/3e77295f888c67fc7645d

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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.