CVE Vulnerabilities

CVE-2011-2533

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

Published: Jun 22, 2011 | Modified: Aug 29, 2017
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 configure script in D-Bus (aka DBus) 1.2.x before 1.2.28 allows local users to overwrite arbitrary files via a symlink attack on an unspecified file in /tmp/.

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
Dbus Freedesktop 1.2.26 1.2.26
Dbus Freedesktop 1.2.20 1.2.20
Dbus Freedesktop 1.2.4 1.2.4
Dbus Freedesktop 1.2.1 1.2.1
Dbus Freedesktop 1.2.10 1.2.10
Dbus Freedesktop 1.2.6 1.2.6
Dbus Freedesktop 1.2.24 1.2.24
Dbus Freedesktop 1.2.22 1.2.22
Dbus Freedesktop 1.2.18 1.2.18
Dbus Freedesktop 1.2.8 1.2.8
Dbus Freedesktop 1.2.16 1.2.16
Dbus Freedesktop 1.2.12 1.2.12
Dbus Freedesktop 1.2.3 1.2.3
Dbus Freedesktop 1.2.14 1.2.14

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