CVE-2021-33542 — HIGH (7.8)

Q: How severe is CVE-2021-33542?

CVE-2021-33542 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-33542?

Check the references section above for vendor advisories and patch information. Affected products include: Phoenixcontact Config\+, Phoenixcontact Pc Worx, Phoenixcontact Pc Worx Express.

Vulnerability 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.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Phoenixcontact	Config\+	<= 1.87
Phoenixcontact	Pc Worx	<= 1.87
Phoenixcontact	Pc Worx Express	<= 1.87

Related Weaknesses (CWE)

CWE-824

References

https://cert.vde.com/en-us/advisories/vde-2021-020Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-782/Third Party AdvisoryVDB Entry
https://cert.vde.com/en-us/advisories/vde-2021-020Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-782/Third Party AdvisoryVDB Entry

FAQ

What is CVE-2021-33542?

CVE-2021-33542 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 co...

How severe is CVE-2021-33542?

CVE-2021-33542 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-33542?

Check the references section above for vendor advisories and patch information. Affected products include: Phoenixcontact Config\+, Phoenixcontact Pc Worx, Phoenixcontact Pc Worx Express.