Path traversal in HashiCorp Nomad

1) Path traversal

EUVDB-ID: #VU48408

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28348

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 File Sandbox Escape via Container Volume Mount. A remote authenticated attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Nomad: 0.1.0 - 0.12.7

External links

http://discuss.hashicorp.com/t/nomad-0-12-8-0-11-7-and-0-10-8-released/17491
http://github.com/hashicorp/nomad/blob/master/CHANGELOG.md#0128-november-10-2020

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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