CVE Vulnerabilities


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

Published: Feb 14, 2011 | Modified: Feb 27, 2020
CVSS 3.x
CVSS 2.x
3.3 LOW

The feh_unique_filename function in utils.c in feh 1.11.2 and earlier might allow local users to create arbitrary files via a symlink attack on a /tmp/feh_ temporary file, a different vulnerability than CVE-2011-0702.


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
Feh Feh_project * 1.11.2 (including)
Feh Feh_project 1.3.5 (including) 1.3.5 (including)
Feh Feh_project 1.4 (including) 1.4 (including)
Feh Feh_project 1.4.1 (including) 1.4.1 (including)
Feh Feh_project 1.4.2 (including) 1.4.2 (including)
Feh Feh_project 1.4.3 (including) 1.4.3 (including)
Feh Feh_project 1.5 (including) 1.5 (including)
Feh Feh_project 1.6 (including) 1.6 (including)
Feh Feh_project 1.6.1 (including) 1.6.1 (including)
Feh Feh_project 1.7 (including) 1.7 (including)
Feh Feh_project 1.8 (including) 1.8 (including)
Feh Feh_project 1.9 (including) 1.9 (including)
Feh Feh_project 1.10 (including) 1.10 (including)
Feh Feh_project 1.10.1 (including) 1.10.1 (including)
Feh Feh_project 1.11 (including) 1.11 (including)
Feh Feh_project 1.11.1 (including) 1.11.1 (including)
Feh Ubuntu artful *
Feh Ubuntu dapper *
Feh Ubuntu hardy *
Feh Ubuntu karmic *
Feh Ubuntu lucid *
Feh Ubuntu maverick *
Feh Ubuntu natty *
Feh Ubuntu oneiric *
Feh Ubuntu precise *
Feh Ubuntu quantal *
Feh Ubuntu raring *
Feh Ubuntu saucy *
Feh Ubuntu upstream *
Feh Ubuntu utopic *
Feh Ubuntu vivid *
Feh Ubuntu wily *
Feh Ubuntu yakkety *
Feh Ubuntu zesty *

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.