ZDI-19-592: Advantech WebAccess Client bwwebv Stack-based Buffer Overflow Remote Code Execution Vulnerability
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-19-592?
The severity of ZDI-19-592 is critical due to the potential for remote code execution without authentication.
How do I fix ZDI-19-592?
To fix ZDI-19-592, apply the security patch provided by Advantech for the WebAccess Client immediately.
Who is affected by ZDI-19-592?
Organizations using Advantech WebAccess Client versions vulnerable to this flaw are at risk.
What type of exposure does ZDI-19-592 represent?
ZDI-19-592 represents an exposure to remote code execution vulnerabilities, allowing attackers to gain control of affected systems.
When was ZDI-19-592 disclosed?
ZDI-19-592 was disclosed on November 26, 2019.