CVE-2020-12497: Phoenix Contact Automationworx PLCOpen XML File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability
First published: Wed Jul 01 2020(Updated: )
PLCopen XML file parsing in Phoenix Contact PC Worx and PC Worx Express version 1.87 and earlier can lead to a stack-based overflow. Manipulated PC Worx projects could lead to a remote code execution due to insufficient input data validation.
Credit: info@cert.vde.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Phoenixcontact Pc Worx | <1.87 | |
| Phoenixcontact Pc Worx Express | <=1.87 | |
| Phoenix Contact Automationworx | ||
| Phoenix Contact PC Worx version 1.87 and prior | ||
| Phoenix Contact PC Worx Express version 1.87 and prior |
Remedy
With the next version of Automation Worx Software Suite (Version > 1.87) a sharpened input data validation with respect to buffer size and description of size and number of objects referenced in a file will be implemented.
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Reference Links
- https://cert.vde.com/de-de/advisories/vde-2020-023
- https://www.zerodayinitiative.com/advisories/ZDI-20-825/
- https://www.zerodayinitiative.com/advisories/ZDI-21-398/
- https://us-cert.cisa.gov/ics/advisories/icsa-20-191-01
- https://cert.vde.com/en-us/advisories/vde-2020-023
- https://www.cisa.gov/news-events/ics-advisories/icsa-20-191-01 (Advisory)
Frequently Asked Questions
What is the vulnerability ID of this vulnerability?
The vulnerability ID is CVE-2020-12497.
What is the severity of CVE-2020-12497?
The severity of CVE-2020-12497 is high with a severity value of 7.8.
Which software is affected by CVE-2020-12497?
Phoenix Contact Automationworx versions up to exclusive 1.87 and Phoenix Contact PC Worx versions up to inclusive 1.87 are affected.
How can this vulnerability be exploited?
This vulnerability can be exploited by remote attackers who can execute arbitrary code on affected installations of Phoenix Contact Automationworx.
Is user interaction required to exploit CVE-2020-12497?
Yes, user interaction is required to exploit this vulnerability. The target must visit a malicious page or open a malicious file.
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