CVE-2021-33542: Phoenix Contact Automationworx BCP File Parsing Memory Corruption Remote Code Execution Vulnerability
First published: Fri Jun 25 2021(Updated: )
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.
Credit: info@cert.vde.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Phoenixcontact Config\+ | <=1.87 | |
| Phoenixcontact Pc Worx | <=1.87 | |
| Phoenixcontact Pc Worx Express | <=1.87 | |
Remedy
Temporary Fix / Mitigation We strongly recommend customers to exchange project files only using secure file exchange services. Project files should not be exchanged via unencrypted email. Remediation With the next version of Automationworx Software Suite the affected data will be initialized completely and thereby freeing of unallocated memory will be prevented.
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this vulnerability?
The vulnerability ID is CVE-2021-33542.
What is the title of this vulnerability?
The title of this vulnerability is Phoenix Contact Automationworx BCP File Parsing Memory Corruption Remote Code Execution Vulnerability.
Which software is affected by this vulnerability?
The Phoenix Contact Classic Automation Worx Software Suite in Version 1.87 and below is affected.
What is the severity of this vulnerability?
The severity of this vulnerability is high (7.8).
How can an attacker exploit this vulnerability?
An attacker can exploit this vulnerability by manipulating PC Worx or Config+ projects to lead to remote code execution.
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- canonical/phoenixcontact pc worx express
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