Path traversal in cflinuxfs3

1) Path traversal

EUVDB-ID: #VU63711

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-1664

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 perform directory traversal attacks.

The vulnerability exists due to input validation error in Dpkg::Source::Archive in dpkg when extracting untrusted source packages in the v2 and v3 source package formats that include a debian.tar. A remote attacker can create a specially crafted package with symbolic links that point to files outside the source tree root directory and overwrite arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cflinuxfs3: 0.0.0 - 0.300.0

External links

http://github.com/cloudfoundry/cflinuxfs3/releases/tag/0.301.0

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.