Path traversal in GNU cpio

1) Path traversal

EUVDB-ID: #VU85896

Risk: High

CVSSv4.0: 5.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-7207

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to overwrite arbitrary files on the system.

The vulnerability exists due to input validation error when processing filenames inside cpio archives. A remote attacker can trick the victim to open a specially crafted cpio archive and overwrite arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cpio: 1.0 - 2.13

CPE2.3

• cpe:2.3:a:gnu:cpio:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:cpio:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:cpio:1.2:*:*:*:*:*:*:*

External links

https://bugzilla.suse.com/show_bug.cgi?id=1218571
https://git.savannah.gnu.org/cgit/cpio.git/commit/?id=376d663340a9dc91c91a5849e5713f07571c1628
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1059163

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

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