CVE-2020-12497

Phoenix Contact Automation Worx <= 1.87: stack-based overflow

Description

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.

Remediation

Solution:

  • 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.

Workaround:

  • We strongly recommend customers to exchange project files only using secure file exchange services. Project files should not be exchanged via unencrypted email. In addition, we recommend exchanging or storing project files together with a checksum to ensure their integrity.

Categories

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.92% Top 30%
Vendor Advisory vde.com
Affected: Phoenix Contact Automation Worx
Affected: Phoenix Contact Automation Worx Express
Published at:
Updated at:

References

Link Tags
https://cert.vde.com/de-de/advisories/vde-2020-023 vendor advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-825/ vdb entry third party advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-398/ vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-12497?
CVE-2020-12497 has been scored as a high severity vulnerability.
How to fix CVE-2020-12497?
To fix CVE-2020-12497: 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.
Is CVE-2020-12497 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-12497 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-12497?
CVE-2020-12497 affects Phoenix Contact Automation Worx, Phoenix Contact Automation Worx Express.
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