CVE Vulnerabilities

CVE-2009-5080

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

Published: Jun 30, 2011 | Modified: Nov 07, 2023
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 (1) contrib/eqn2graph/eqn2graph.sh, (2) contrib/grap2graph/grap2graph.sh, and (3) contrib/pic2graph/pic2graph.sh scripts in GNU troff (aka groff) 1.21 and earlier do not properly handle certain failed attempts to create temporary directories, which might allow local users to overwrite arbitrary files via a symlink attack on a file in a temporary directory, a different vulnerability than CVE-2004-1296.

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
Groff Gnu * 1.21 (including)
Groff Gnu 1.10 (including) 1.10 (including)
Groff Gnu 1.11 (including) 1.11 (including)
Groff Gnu 1.11a (including) 1.11a (including)
Groff Gnu 1.14 (including) 1.14 (including)
Groff Gnu 1.15 (including) 1.15 (including)
Groff Gnu 1.16 (including) 1.16 (including)
Groff Gnu 1.16.1 (including) 1.16.1 (including)
Groff Gnu 1.17.1 (including) 1.17.1 (including)
Groff Gnu 1.17.2 (including) 1.17.2 (including)
Groff Gnu 1.18.1 (including) 1.18.1 (including)
Groff Gnu 1.19 (including) 1.19 (including)
Groff Gnu 1.19.1 (including) 1.19.1 (including)
Groff Gnu 1.19.2 (including) 1.19.2 (including)
Groff Gnu 1.20 (including) 1.20 (including)
Groff Gnu 1.20.1 (including) 1.20.1 (including)

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