OS command injection in less

1) OS Command Injection

EUVDB-ID: #VU88533

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-32487

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation when handling newline characters in the filename in filename.c. A remote attacker can trick the victim to pass a specially crafted filename to the affected command and execute arbitrary OS commands on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

less: 243 - 653

External links

http://www.openwall.com/lists/oss-security/2024/04/13/2
http://www.openwall.com/lists/oss-security/2024/04/12/5
http://github.com/gwsw/less/commit/007521ac3c95bc76e3d59c6dbfe75d06c8075c33

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.