CVE Vulnerabilities

CVE-2014-6407

Improper Link Resolution Before File Access ('Link Following')

Published: Dec 12, 2014 | Modified: Dec 15, 2014
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
3.7 LOW
AV:L/AC:H/Au:M/C:N/I:C/A:N
RedHat/V3
Ubuntu
MEDIUM

Docker before 1.3.2 allows remote attackers to write to arbitrary files and execute arbitrary code via a (1) symlink or (2) hard link attack in an image archive in a (a) pull or (b) load operation.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Name Vendor Start Version End Version
Docker Docker * 1.3.1 (including)
Docker Docker 1.0.0 (including) 1.0.0 (including)
Docker Docker 1.3.0 (including) 1.3.0 (including)
Red Hat Enterprise Linux 7 Extras RedHat docker-0:1.3.2-4.el7 *
Docker.io Ubuntu upstream *
Docker.io Ubuntu utopic *

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References