CVE-2021-22235 : What You Need to Know

Wireshark 3.4.0 to 3.4.6 and 3.2.0 to 3.2.14 versions are vulnerable to a denial of service attack due to a crash in DNP dissector. The CVE-2021-22235 vulnerability allows attackers to trigger a denial of service via packet injection or a crafted capture file.

Understanding CVE-2021-22235

This section provides detailed insights into the CVE-2021-22235 vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-22235?

The CVE-2021-22235 vulnerability relates to a crash in the DNP dissector in Wireshark versions 3.4.0 to 3.4.6 and 3.2.0 to 3.2.14. It can be exploited by attackers to cause a denial of service using packet injection or a specially crafted capture file.

The Impact of CVE-2021-22235

The impact of CVE-2021-22235 is rated as HIGH. Attackers can exploit this vulnerability to disrupt the availability of affected systems without requiring any special privileges. However, it does not impact confidentiality or integrity.

Technical Details of CVE-2021-22235

This section discusses the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

CVE-2021-22235 involves mismatched memory management routines in Wireshark, leading to a crash in the DNP dissector, allowing for denial of service attacks through packet injection or crafted capture files.

Affected Systems and Versions

The Wireshark Foundation's Wireshark versions 3.4.0 to 3.4.6 and 3.2.0 to 3.2.14 are affected by CVE-2021-22235. Systems with these versions are vulnerable to exploitation.

Exploitation Mechanism

The exploitation of CVE-2021-22235 involves leveraging the crash in the DNP dissector to inject malicious packets or use manipulated capture files.

Mitigation and Prevention

Learn how to protect your systems and network from CVE-2021-22235 with effective mitigation and prevention techniques.

Immediate Steps to Take

It is recommended to update Wireshark to versions 3.4.7 or 3.2.15 to mitigate the vulnerability. Additionally, network segmentation and traffic monitoring can help detect and prevent potential attacks.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and keeping software up to date are essential for long-term security.

Patching and Updates

Stay informed about security patches and updates released by Wireshark to address vulnerabilities like CVE-2021-22235 and ensure timely deployment to secure your systems and data.