Link following in Apple CUPS

1) Link following

EUVDB-ID: #VU32580

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-6891

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

CUPS: 1.7.0

CPE2.3

• cpe:2.3:a:apple:cups:1.7.0:*:*:*:*:*:*:*

External links

https://advisories.mageia.org/MGASA-2014-0021.html
https://secunia.com/advisories/56531
https://www.cups.org/blog.php?L704
https://www.cups.org/str.php?L4319
https://www.mandriva.com/security/advisories?name=MDVSA-2014:015
https://www.ubuntu.com/usn/USN-2082-1

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.