ZDI-20-955: 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-20-955?
The severity of ZDI-20-955 is critical due to the potential for remote code execution.
How do I fix ZDI-20-955?
To fix ZDI-20-955, update your Advantech WebAccess/HMI Designer software to the latest version provided by the vendor.
What kind of attacks can exploit ZDI-20-955?
ZDI-20-955 can be exploited via malicious web pages or files that require user interaction.
Who is affected by ZDI-20-955?
Organizations using Advantech WebAccess/HMI Designer are affected by ZDI-20-955.
Is user interaction required for exploiting ZDI-20-955?
Yes, user interaction is required as the target must visit a malicious page or open a malicious file.