Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2015-1335

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

Published: Oct 01, 2015 | Modified: May 31, 2019
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
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

Name Vendor Start Version End Version
Lxc Linuxcontainers * 1.0.7
Lxc Linuxcontainers 1.1.1 1.1.1
Lxc Linuxcontainers 1.1.3 1.1.3
Lxc Linuxcontainers 1.1.2 1.1.2
Lxc Linuxcontainers 1.1.0 1.1.0

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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