CVE-2021-42707 : Vulnerability Insights and Analysis

WECON PLC Editor Versions 1.3.8 and prior is vulnerable to an out-of-bounds write while processing project files, potentially allowing attackers to execute arbitrary code.

Understanding CVE-2021-42707

PLC Editor by WECON is susceptible to an out-of-bounds write vulnerability with significant impact.

What is CVE-2021-42707?

CVE-2021-42707 refers to a high-severity vulnerability in WECON PLC Editor versions 1.3.8 and earlier. The flaw enables attackers to trigger an out-of-bounds write during the processing of project files, a critical security risk.

The Impact of CVE-2021-42707

The vulnerability has a CVSS base score of 7.8, indicating a high severity level with significant effects on confidentiality, integrity, and availability. The attacker can execute arbitrary code by exploiting this flaw.

Technical Details of CVE-2021-42707

WECON PLC Editor vulnerability specifics and affected components.

Vulnerability Description

The vulnerability in PLC Editor versions 1.3.8 and earlier allows for an out-of-bounds write during project file processing, enabling potential arbitrary code execution.

Affected Systems and Versions

Product: PLC Editor
Vendor: WECON
Versions Affected: <= 1.3.8 (All)

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Local
Privileges Required: None
User Interaction: Required
Scope: Unchanged

Mitigation and Prevention

Actions to mitigate the CVE-2021-42707 vulnerability.

Immediate Steps to Take

Users are advised to contact WECON technical support for guidance

Long-Term Security Practices

Regularly update software to patched versions
Employ security best practices to prevent code execution exploits
Consider network segmentation for enhanced security

Patching and Updates

Await WECON's response for fixes
Apply relevant security patches promptly