CVE Vulnerabilities

CVE-2011-0702

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

Published: Feb 14, 2011 | Modified: Feb 27, 2020
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
3.3 LOW
AV:L/AC:M/Au:N/C:N/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

The feh_unique_filename function in utils.c in feh before 1.11.2 might allow local users to overwrite arbitrary files via a symlink attack on a /tmp/feh_ temporary file.

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
Feh Feh_project 1.3.5 1.3.5
Feh Feh_project 1.4 1.4
Feh Feh_project 1.4.1 1.4.1
Feh Feh_project 1.4.2 1.4.2
Feh Feh_project 1.4.3 1.4.3
Feh Feh_project 1.5 1.5
Feh Feh_project 1.6 1.6
Feh Feh_project 1.6.1 1.6.1
Feh Feh_project 1.7 1.7
Feh Feh_project 1.8 1.8
Feh Feh_project 1.9 1.9
Feh Feh_project 1.10 1.10
Feh Feh_project 1.10.1 1.10.1
Feh Feh_project 1.11 1.11
Feh Feh_project * 1.11.1

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