#VU48408 Path traversal in Nomad - CVE-2020-28348

Vulnerability identifier: #VU48408

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-28348

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nomad
Server applications / Virtualization software

Vendor: HashiCorp

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, 0.2.0 - 0.2.3, 0.3.0 - 0.3.2, 0.4.0 - 0.4.3, 0.5.0 - 0.5.6, 0.6.0 - 0.6.3, 0.7.0 - 0.7.1, 0.8.0 - 0.8.7, 0.9.0 - 0.9.7

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

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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.