CVE-2015-6240

The chroot, jail, and zone connection plugins in ansible before 1.9.2 allow local users to escape a restricted environment via a symlink attack.

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://www.openwall.com/lists/oss-security/2015/08/17/10
• https://bugzilla.redhat.com/show_bug.cgi?id=1243468
• https://github.com/ansible/ansible/commit/952166f48eb0f5797b75b160fd156bbe1e8fc647
• https://github.com/ansible/ansible/commit/ca2f2c4ebd7b5e097eab0a710f79c1f63badf95b
• https://lists.debian.org/debian-lts-announce/2019/09/msg00016.html