ZDI-20-959: Advantech WebAccess/HMI Designer PM3 File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess/HMI Designer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of PM3 files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-20-959?
The severity of ZDI-20-959 is classified as critical due to its potential for remote code execution.
How do I fix ZDI-20-959?
To fix ZDI-20-959, users should update Advantech WebAccess/HMI Designer to the latest version provided by the vendor.
What are the requirements to exploit ZDI-20-959?
Exploitation of ZDI-20-959 requires user interaction whereby the target must visit a malicious page or open a malicious file.
Who is affected by ZDI-20-959?
ZDI-20-959 affects installations of Advantech WebAccess/HMI Designer.
What kind of vulnerability is ZDI-20-959?
ZDI-20-959 is a remote code execution vulnerability, allowing attackers to run arbitrary code on vulnerable systems.