Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2013-4169

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

Published: Sep 10, 2013 | Modified: Sep 12, 2013
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
6.9 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C
RedHat/V2
6.2 IMPORTANT
AV:L/AC:H/Au:N/C:C/I:C/A:C
RedHat/V3
Ubuntu
MEDIUM
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2013-4169
CWEhttps://cwe.mitre.org/data/definitions/59.html

GNOME Display Manager (gdm) before 2.21.1 allows local users to change permissions of arbitrary directories via a symlink attack on /tmp/.X11-unix/.

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
Gnome_display_manager Gnome * 2.21 (including)
Gnome_display_manager Gnome 0.7 (including) 0.7 (including)
Gnome_display_manager Gnome 1.0 (including) 1.0 (including)
Gnome_display_manager Gnome 2.0 (including) 2.0 (including)
Gnome_display_manager Gnome 2.2 (including) 2.2 (including)
Gnome_display_manager Gnome 2.13 (including) 2.13 (including)
Gnome_display_manager Gnome 2.14 (including) 2.14 (including)
Gnome_display_manager Gnome 2.14.1 (including) 2.14.1 (including)
Gnome_display_manager Gnome 2.14.2 (including) 2.14.2 (including)
Gnome_display_manager Gnome 2.14.3 (including) 2.14.3 (including)
Gnome_display_manager Gnome 2.14.4 (including) 2.14.4 (including)
Gnome_display_manager Gnome 2.14.5 (including) 2.14.5 (including)
Gnome_display_manager Gnome 2.14.6 (including) 2.14.6 (including)
Gnome_display_manager Gnome 2.14.7 (including) 2.14.7 (including)
Gnome_display_manager Gnome 2.14.8 (including) 2.14.8 (including)
Gnome_display_manager Gnome 2.14.9 (including) 2.14.9 (including)
Gnome_display_manager Gnome 2.14.10 (including) 2.14.10 (including)
Gnome_display_manager Gnome 2.14.11 (including) 2.14.11 (including)
Gnome_display_manager Gnome 2.14.12 (including) 2.14.12 (including)
Gnome_display_manager Gnome 2.15 (including) 2.15 (including)
Gnome_display_manager Gnome 2.16 (including) 2.16 (including)
Gnome_display_manager Gnome 2.16.1 (including) 2.16.1 (including)
Gnome_display_manager Gnome 2.16.2 (including) 2.16.2 (including)
Gnome_display_manager Gnome 2.17 (including) 2.17 (including)
Gnome_display_manager Gnome 2.18 (including) 2.18 (including)
Gnome_display_manager Gnome 2.18.1 (including) 2.18.1 (including)
Gnome_display_manager Gnome 2.18.2 (including) 2.18.2 (including)
Gnome_display_manager Gnome 2.18.3 (including) 2.18.3 (including)
Gnome_display_manager Gnome 2.19 (including) 2.19 (including)
Gnome_display_manager Gnome 2.19.1 (including) 2.19.1 (including)
Gnome_display_manager Gnome 2.19.2 (including) 2.19.2 (including)
Gnome_display_manager Gnome 2.19.3 (including) 2.19.3 (including)
Gnome_display_manager Gnome 2.19.4 (including) 2.19.4 (including)
Gnome_display_manager Gnome 2.20.0 (including) 2.20.0 (including)
Gnome_display_manager Gnome 2.20.1 (including) 2.20.1 (including)
Gnome_display_manager Gnome 2.20.2 (including) 2.20.2 (including)
Gnome_display_manager Gnome 2.20.3 (including) 2.20.3 (including)
Gnome_display_manager Gnome 2.20.4 (including) 2.20.4 (including)
Gnome_display_manager Gnome 2.20.5 (including) 2.20.5 (including)
Gnome_display_manager Gnome 2.20.6 (including) 2.20.6 (including)
Gnome_display_manager Gnome 2.20.7 (including) 2.20.7 (including)
Gnome_display_manager Gnome 2.20.8 (including) 2.20.8 (including)
Gnome_display_manager Gnome 2.20.9 (including) 2.20.9 (including)
Gnome_display_manager Gnome 2.20.10 (including) 2.20.10 (including)
Red Hat Enterprise Linux 5 RedHat gdm-1:2.16.0-59.el5_9.1 *
Red Hat Enterprise Linux 5 RedHat initscripts-0:8.45.42-2.el5_9.1 *
Gdm Ubuntu lucid *

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

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2024 Aqua Security Software Ltd.   Privacy Policy | Terms of Use