Kerberos AppContainer Security Feature Bypass Vulnerability. An attacker could bypass the Kerberos service ticketing feature which performs user access control checks. An low privilege attacker could execute a script within an App Container to request a service ticket and thereby gain elevation to the service privilege. In this case, a successful attack could be performed from a low privilege AppContainer. The attacker could elevate their privileges and execute code or access resources at a higher integrity level than that of the AppContainer execution environment.