LXD before version 0.19-0ubuntu5 doUidshiftIntoContainer() has an unsafe Chmod() call that races against the stat in the Filepath.Walk() function. A symbolic link created in that window could cause any file on the system to have any mode of the attacker’s choice.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1340
Reference (s):
- https://github.com/lxc/lxd/commit/19c6961cc1012c8a529f20807328a9357f5034f4