Permissions, Privileges, and Access Controls
Tunnelblick 3.3beta20 and earlier relies on a test for specific ownership and permissions to determine whether a program can be safely executed, which allows local users to bypass intended access restrictions and gain privileges via a (1) user-mountable image or (2) network share.
CWE-264 - Permissions Privileges and Access Controls
CWE 264 (permissions, privileges, and access controls) is not a weakness in and of itself, rather it is a category of weaknesses related to the management of permissions, privileges, and other security features used to perform access control. If not addressed, the weaknesses in this category allow attackers to gain privileges for an unintended sphere of control, access sensitive information, and execute arbitrary commands.