EMC AutoStart ftAgent Opcode 0x41 Subcode 0x00 Parsing Remote Code Execution Vulnerability

2012-07-12T00:00:00
ID ZDI-12-119
Type zdi
Reporter gwslabs.com
Modified 2012-06-22T00:00:00

Description

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of EMC Autostart. Authentication is not required to exploit this vulnerability. The specific flaw exists within the ftAgent.exe service, which listens by default on TCP port 8045. When handling messages with opcode 65 (0x41) and subcode 00, the vulnerable function uses a uninitialized stack variable in calculating a memory pointer. Also, the function uses signed extension and signed comparison when checking the uninitialized stack variable, which allows arbitrary negative values to bypass the check. This could result in corruption of a controlled memory location, which can be leveraged to execute code under the context of the SYSTEM user.