Advantech R-SeeNet show_code Endpoint Stack-based Buffer Overflow Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech R-SeeNet. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of POST requests sent to the show_code.php endpoint. When processing the filename element, the process does not properly validate 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 the service account.