Advantech WebAccess Client bwwebd Stack-based Buffer Overflow Remote Code Execution Vulnerability

2018-10-24T00:00:00
ID ZDI-18-1313
Type zdi
Reporter Mat Powell of Trend Micro Zero Day Initiative
Modified 2018-06-22T00:00:00

Description

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Advantech WebAccess Node. Authentication is not required to exploit this vulnerability. The specific flaw exists within bwwebd.exe, which is accessed through the 0x2711 IOCTL in the webvrpcs process. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this functionality to execute code under the context of Administrator.