Path traversal in GNU cpio

1) Path traversal

EUVDB-ID: #VU85896

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

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

External links

http://bugzilla.suse.com/show_bug.cgi?id=1218571
http://git.savannah.gnu.org/cgit/cpio.git/commit/?id=376d663340a9dc91c91a5849e5713f07571c1628
http://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.