CVE-2021-30193 : Security Advisory and Response

CODESYS V2 Web-Server before 1.1.9.20 has an Out-of-bounds Write vulnerability that could impact system security.

Understanding CVE-2021-30193

This CVE identifier refers to a specific security issue found in the CODESYS V2 Web-Server software.

What is CVE-2021-30193?

CVE-2021-30193 is an Out-of-bounds Write vulnerability identified in the CODESYS V2 Web-Server software version prior to 1.1.9.20. This vulnerability could potentially be exploited by attackers to compromise the affected systems.

The Impact of CVE-2021-30193

The impact of this vulnerability could lead to unauthorized access, manipulation of data, or even complete system compromise. It is crucial to address this issue promptly to prevent any potential security breaches.

Technical Details of CVE-2021-30193

Here are specific technical details related to CVE-2021-30193:

Vulnerability Description

The vulnerability involves an Out-of-bounds Write issue in CODESYS V2 Web-Server before version 1.1.9.20, allowing attackers to overwrite memory locations outside of the intended boundaries.

Affected Systems and Versions

The vulnerability affects CODESYS V2 Web-Server versions before 1.1.9.20. Users with these versions are advised to take immediate action to mitigate the risk.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted requests to the vulnerable web server, triggering the Out-of-bounds Write condition and potentially gaining unauthorized access.

Mitigation and Prevention

To address CVE-2021-30193 and enhance system security, consider the following mitigation strategies:

Immediate Steps to Take

Update the CODESYS V2 Web-Server software to version 1.1.9.20 or newer to eliminate the vulnerability.
Monitor network traffic for any suspicious activities that could indicate exploitation attempts.

Long-Term Security Practices

Regularly apply security patches and updates to all software components to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential security breaches.

Patching and Updates

Stay informed about security advisories from CODESYS and promptly apply patches and updates to ensure the security of your systems.