CVE-2013-6891 Path traversal in n/a

Low 1.2 Published 26 Jan 2014 Updated 6 Aug 2024

Local attackers can read arbitrary files via symlink attacks on CUPS lppasswd due to insecure HOME variable handling.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2013-6891?

CVE-2013-6891 is a low-severity path traversal vulnerability in Apple Cups, published on 26 Jan 2014. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

lppasswd in CUPS before 1.7.1, when running with setuid privileges, allows local users to read portions of arbitrary files via a modified HOME environment variable and a symlink attack involving .cups/client.conf.

Weakness: CWE-59

Which versions are affected by CVE-2013-6891?

It affects 2 products.

Products include Apple Cups, Canonical Ubuntu Linux.

How do I fix CVE-2013-6891?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2013-6891 being exploited?

There is no known exploitation of CVE-2013-6891 in the wild and no public exploit code.

All Apple Cups vulnerabilities

Sources

Also known as DEBIAN-CVE-2013-6891, GHSA-r8jg-q736-v263, MGASA-2014-0021.