CVE-2021-30194 : Exploit Details and Defense Strategies

This article provides an overview of CVE-2021-30194, detailing the vulnerability in CODESYS V2 Web-Server before version 1.1.9.20.

Understanding CVE-2021-30194

CVE-2021-30194 is an Out-of-bounds Read vulnerability identified in CODESYS V2 Web-Server before version 1.1.9.20.

What is CVE-2021-30194?

CODESYS V2 Web-Server version 1.1.9.20 and earlier is prone to an Out-of-bounds Read vulnerability.

The Impact of CVE-2021-30194

This vulnerability could allow an attacker to read data outside the bounds of an allocated memory buffer, potentially leading to sensitive information exposure or a denial of service.

Technical Details of CVE-2021-30194

The technical details of CVE-2021-30194 are as follows:

Vulnerability Description

CODESYS V2 Web-Server before version 1.1.9.20 is affected by an Out-of-bounds Read vulnerability.

Affected Systems and Versions

All versions of CODESYS V2 Web-Server before 1.1.9.20 are impacted by this vulnerability.

Exploitation Mechanism

An attacker can exploit this vulnerability by sending specially crafted requests to the affected Web-Server, triggering the Out-of-bounds Read condition.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-30194, consider the following steps:

Immediate Steps to Take

Update the CODESYS V2 Web-Server to version 1.1.9.20 or newer to eliminate the vulnerability.
Monitor network traffic for any suspicious activity indicating a potential exploit.

Long-Term Security Practices

Regularly apply security patches and updates to all software components to address known vulnerabilities.
Employ network monitoring and intrusion detection systems to detect and prevent unauthorized access.

Patching and Updates

Stay informed about security advisories from the vendor and promptly apply patches and updates to ensure the security of CODESYS V2 Web-Server.