Symantec Endpoint Protection AvHostPlugin Out-Of-Bounds Write Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Symantec Endpoint Protection. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the AvHostPlugin.dll. The issue results from the lack of proper validation of user-supplied data, which can result in a write before the start of an allocated buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.