Advantech WebAccess Client bwwebv Stack-based Buffer Overflow Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess Client. Authentication is not required to exploit this vulnerability.
The specific flaw exists within bwwebv.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 vulnerability to execute code in the context of Administrator.
Additional Details
Advantech has issued an update to correct this vulnerability. More details can be found at:
https://www.us-cert.gov/ics/advisories/icsa-19-178-05
Disclosure Timeline
- 2019-03-01 - Vulnerability reported to vendor
- 2019-07-02 - Coordinated public release of advisory
Credit
Mat Powell of Trend Micro Zero Day Initiative
