Privilege escalation in util-linux wall

1) Input validation error

EUVDB-ID: #VU87906

Risk: Low

CVSSv3.1: 6.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2024-28085

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insufficient validation of user-supplied arguments along with setgid tty permissions within the wall command. A local user can execute arbitrary commands with escalated privileges on the system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Util-linux: 2.2 - 2.40

External links

http://people.rit.edu/sjf5462/6831711781/wall_2_27_2024.txt
http://github.com/util-linux/util-linux/security/advisories/GHSA-xv2h-c6ww-mrjq
http://mirrors.edge.kernel.org/pub/linux/utils/util-linux/
http://www.openwall.com/lists/oss-security/2024/03/27/5
http://github.com/skyler-ferrante/CVE-2024-28085

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. However, proof of concept for this vulnerability is available.