CVE-2015-1331

lxclock.c in LXC 1.1.2 and earlier allows local users to create arbitrary files via a symlink attack on /run/lock/lxc/*.

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

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.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/132.html
• https://cwe.mitre.org/data/definitions/17.html
• https://cwe.mitre.org/data/definitions/35.html
• https://cwe.mitre.org/data/definitions/76.html

References

• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html
• http://lists.opensuse.org/opensuse-updates/2015-07/msg00066.html
• http://www.debian.org/security/2015/dsa-3317
• http://www.securityfocus.com/bid/75999
• http://www.ubuntu.com/usn/USN-2675-1
• https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1470842
• https://github.com/lxc/lxc/commit/72cf81f6a3404e35028567db2c99a90406e9c6e6
• https://service.ait.ac.at/security/2015/LxcSecurityAnalysis.html