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 | Affected Version | How to fix |
|---|---|---|
| Advantech WebAccess/HMI Designer |
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Reference Links
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.
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