CVE Vulnerabilities

CVE-2011-2923

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

Published: Nov 19, 2019 | Modified: Aug 18, 2020
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS 2.x
3.3 LOW
AV:L/AC:M/Au:N/C:N/I:P/A:P
RedHat/V2
1.9 LOW
AV:L/AC:M/Au:N/C:N/I:P/A:N
RedHat/V3
Ubuntu
LOW

foomatic-rip filter, all versions, used insecurely creates temporary files for storage of PostScript data by rendering the data when the debug mode was enabled. This flaw may be exploited by a local attacker to conduct symlink attacks by overwriting arbitrary files accessible with the privileges of the user running the foomatic-rip universal print filter.

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
Foomatic-filters Linuxfoundation * *
Foomatic-filters Ubuntu devel *
Foomatic-filters Ubuntu hardy *
Foomatic-filters Ubuntu lucid *
Foomatic-filters Ubuntu maverick *
Foomatic-filters Ubuntu natty *
Foomatic-filters Ubuntu oneiric *
Foomatic-filters Ubuntu precise *
Foomatic-filters Ubuntu quantal *
Foomatic-filters Ubuntu raring *
Foomatic-filters Ubuntu saucy *
Foomatic-filters Ubuntu trusty *
Foomatic-filters Ubuntu utopic *
Foomatic-filters Ubuntu vivid *

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