Path traversal in Container Projects Buildah

1) Path traversal

EUVDB-ID: #VU26643

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10696

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 when processing directory traversal sequences. A remote attacker can trick a victim to build a malicious container image hosted on an HTTP(s) server and then write files to the user's system anywhere that the user has permissions.

Mitigation

Install update from vendor's website.

Vulnerable software versions

buildah: 0.1 - 1.14.3

External links

http://access.redhat.com/security/cve/cve-2020-10696
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10696
http://github.com/containers/buildah/pull/2245

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.