Phoenix Contact: Automation Worx Software Suite affected by Remote Code Execution (RCE) vulnerability
CVE-2021-33542

7.8HIGH

Key Information:

Vendor: Phoenix Contact
Status: Automation Worx Software Suite
Vendor: CVE Published:; 25 June 2021

Summary

Phoenix Contact Classic Automation Worx Software Suite in Version 1.87 and below is affected by a remote code execution vulnerability. Manipulated PC Worx or Config+ projects could lead to a remote code execution when unallocated memory is freed because of incompletely initialized data. The attacker needs to get access to an original bus configuration file (*.bcp) to be able to manipulate data inside. After manipulation the attacker needs to exchange the original file by the manipulated one on the application programming workstation. Availability, integrity, or confidentiality of an application programming workstation might be compromised by attacks using these vulnerabilities. Automated systems in operation which were programmed with one of the above-mentioned products are not affected.

Affected Version(s)

Automation Worx Software Suite PC Worx <= 1.87

Automation Worx Software Suite PC Worx Express <= 1.87

Automation Worx Software Suite Config+ <= 1.87

References

https://cert.vde.com/en-us/advisories/vde-2021-020

x_refsource_CONFIRM

https://www.zerodayinitiative.com/advisories/ZDI-21-782/

x_refsource_MISC

CVSS V3.1

Score:

7.8

Severity:

HIGH

Confidentiality:

High

Integrity:

High

Availability:

High

Attack Vector:

Local

Attack Complexity:

Low

Privileges Required:

None

User Interaction:

Required

Scope:

Unchanged

Timeline

Vulnerability published
Jun 25, 2021
Vulnerability Reserved
May 24, 2021

Credit

The vulnerability was discovered by Francis Provencher {PRL} and reported by Zero Day Initiative (ZDI) as ZDI-CAN-13134. PHOENIX CONTACT thanks CERT@VDE for the coordination and support with this publication.