Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2015-1335

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

Published: Oct 01, 2015 | Modified: Apr 12, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2015-1335
CWEhttps://cwe.mitre.org/data/definitions/59.html

lxc-start in lxc before 1.0.8 and 1.1.x before 1.1.4 allows local container administrators to escape AppArmor confinement via a symlink attack on a (1) mount target or (2) bind mount source.

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

NameVendorStart VersionEnd Version
LxcLinuxcontainers*1.0.7 (including)
LxcLinuxcontainers1.1.0 (including)1.1.0 (including)
LxcLinuxcontainers1.1.1 (including)1.1.1 (including)
LxcLinuxcontainers1.1.2 (including)1.1.2 (including)
LxcLinuxcontainers1.1.3 (including)1.1.3 (including)
LxcUbuntuesm-infra-legacy/trusty*
LxcUbuntuprecise*
LxcUbuntutrusty*
LxcUbuntutrusty/esm*
LxcUbuntuupstream*
LxcUbuntuvivid*
LxcUbuntuvivid/stable-phone-overlay*

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

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