Command injection in Docker

Published: 2019-09-10

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2019-13139
CWE-ID	CWE-77
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software Subscribe	Docker Engine Server applications / Virtualization software
Vendor	Docker Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Command Injection

EUVDB-ID: #VU20954

Risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-13139

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

The vulnerability allows a local attacker to inject and execute arbitrary commands on the target system.

The vulnerability exists due to the affected software misinterprets the "git ref" command as a flag. A local authenticated user who is able to execute the "docker build" command and has control over the build path can inject and execute arbitrary commands on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Docker Engine: 0.1.0 - 18.09.3

External links

http://docs.docker.com/engine/release-notes/#18094
http://github.com/moby/moby/pull/38944
http://staaldraad.github.io/post/2019-07-16-cve-2019-13139-docker-build/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.