CVE-2021-33542
Assigner: CERTVDE
Published: 2021-06-23T00:00:00
State: PUBLISHED
affected: product: Automation Worx Software Suite
vendor: Phoenix Contact
versions: lessThanOrEqual: 1.87
status: affected
version: PC Worx
versionType: custom
lessThanOrEqual: 1.87
status: affected
version: PC Worx Express
versionType: custom
lessThanOrEqual: 1.87
status: affected
version: Config+
versionType: custom
credits: value: 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.
datePublic: 2021-06-23T00:00:00
descriptions: value: 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.
metrics: cvssV3_1: attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 7.8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
version: 3.1
problemTypes: descriptions: cweId: CWE-824
description: CWE-824 Access of Uninitialized Pointer
type: CWE
solutions: value: 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.
source: advisory: VDE-2021-020
defect: VDE-2021-020
discovery: EXTERNAL
title: Phoenix Contact: Automation Worx Software Suite affected by Remote Code Execution (RCE) vulnerability
x_generator: engine: Vulnogram 0.0.9