Advantech WebAccess webvrpcs Service DrawSrv.dll Path BwBuildPath Stack-Based Buffer Overflow Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on vulnerable instances of Advantech WebAccess. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of the 0x2790 IOCTL in the DrawSrv subsystem. A stack-based buffer overflow vulnerability exists in a call to BwBuildPath with the Path parameter. An attacker can use this vulnerability to execute arbitrary code in the context of an administrator of the system.