CVE-2021-33542 Phoenix Contact: Automation Worx Software Suite affected by Remote Code Execution (RCE) vulnerability
Attackers can execute arbitrary code on programming workstations by tricking users into opening manipulated project files, compromising system integrity and availability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-33542?
CVE-2021-33542 is a high-severity use after free vulnerability in Phoenix Contact Automation Worx Software Suite, published on 25 Jun 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-824
Which versions are affected by CVE-2021-33542?
It affects 3 products.
Products include Phoenixcontact Config\+, Phoenixcontact Pc Worx, Phoenixcontact Pc Worx Express.
How do I fix CVE-2021-33542?
No fix has been published for CVE-2021-33542 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-33542 being exploited?
There is no known exploitation of CVE-2021-33542 in the wild and no public exploit code.
Other vulnerabilities in Phoenix Contact Automation Worx Software Suite
Sources
Also known as GHSA-88r6-jjq4-269q.