7.8
HIGH
CVE-2021-33542
Phoenix Contact Classic Automation Worx Software Suite Remote Code Execution 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.

INFO

Published Date :

June 25, 2021, 7:15 p.m.

Last Modified :

Nov. 21, 2024, 6:09 a.m.

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2021-33542 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Phoenixcontact config\+
2 Phoenixcontact pc_worx
3 Phoenixcontact pc_worx_express
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-33542.

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

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-33542 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-33542 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://cert.vde.com/en-us/advisories/vde-2021-020
    Added Reference https://www.zerodayinitiative.com/advisories/ZDI-21-782/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Sep. 20, 2021

    Action Type Old Value New Value
    Changed Reference Type https://www.zerodayinitiative.com/advisories/ZDI-21-782/ No Types Assigned https://www.zerodayinitiative.com/advisories/ZDI-21-782/ Third Party Advisory, VDB Entry
  • CVE Modified by [email protected]

    Jul. 07, 2021

    Action Type Old Value New Value
    Added Reference https://www.zerodayinitiative.com/advisories/ZDI-21-782/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Jul. 02, 2021

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:H/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type https://cert.vde.com/en-us/advisories/vde-2021-020 No Types Assigned https://cert.vde.com/en-us/advisories/vde-2021-020 Third Party Advisory
    Added CWE NIST CWE-824
    Added CPE Configuration OR *cpe:2.3:a:phoenixcontact:config\+:*:*:*:*:*:*:*:* versions up to (including) 1.87 *cpe:2.3:a:phoenixcontact:pc_worx:*:*:*:*:*:*:*:* versions up to (including) 1.87 *cpe:2.3:a:phoenixcontact:pc_worx_express:*:*:*:*:*:*:*:* versions up to (including) 1.87
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-33542 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-33542 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.28 }} 0.07%

score

0.68158

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability