CVE Vulnerabilities

CVE-2014-3537

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

Published: Jul 23, 2014 | Modified: Feb 13, 2023
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
1.2 LOW
AV:L/AC:H/Au:N/C:P/I:N/A:N
RedHat/V2
5 MODERATE
AV:L/AC:M/Au:S/C:C/I:P/A:N
RedHat/V3
Ubuntu
MEDIUM

The web interface in CUPS before 1.7.4 allows local users in the lp group to read arbitrary files via a symlink attack on a file in /var/cache/cups/rss/.

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
Cups Apple * 1.7.3 (including)
Cups Apple 1.7-rc1 (including) 1.7-rc1 (including)
Cups Apple 1.7.0 (including) 1.7.0 (including)
Cups Apple 1.7.1 (including) 1.7.1 (including)
Cups Apple 1.7.1-b1 (including) 1.7.1-b1 (including)
Cups Apple 1.7.2 (including) 1.7.2 (including)
Red Hat Enterprise Linux 6 RedHat cups-1:1.4.2-67.el6 *
Red Hat Enterprise Linux 7 RedHat cups-1:1.6.3-17.el7 *
Cups Ubuntu lucid *
Cups Ubuntu precise *
Cups Ubuntu trusty *
Cups Ubuntu upstream *

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