CVE-2014-5030

CUPS before 2.0 allows local users to read arbitrary files via a symlink attack on (1) index.html, (2) index.class, (3) index.pl, (4) index.php, (5) index.pyc, or (6) index.py.

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
Ubuntu_linux	Canonical	10.04 (including)	10.04 (including)
Ubuntu_linux	Canonical	12.04 (including)	12.04 (including)
Ubuntu_linux	Canonical	14.04 (including)	14.04 (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.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2014-5030
CWE	https://cwe.mitre.org/data/definitions/59.html

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

Weakness

Affected Software

Potential Mitigations

References

CVE-2014-5030

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

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References