#VU81432 Out-of-bounds read in libx11 - CVE-2023-43785

Vulnerability identifier: #VU81432

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-43785

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
libx11
Other software / Other software solutions

Vendor: xorg.freedesktop.org

Description

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

The vulnerability exists due to a boundary condition within the _XkbReadKeySyms() function. A local user can trigger an out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libx11: 1.0.99.1 - 1.8.7

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External links
https://seclists.org/oss-sec/2023/q4/17
https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/6858d468d9ca55fb4c5fd70b223dbc78a3358a7f

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?