CVE-2020-9430 : What You Need to Know

Wireshark versions 3.2.0 to 3.2.1, 3.0.0 to 3.0.8, and 2.6.0 to 2.6.14 are affected by a vulnerability in the WiMax DLMAP dissector that could lead to a crash.

Understanding CVE-2020-9430

This CVE entry pertains to a specific vulnerability found in Wireshark versions.

What is CVE-2020-9430?

In Wireshark versions 3.2.0 to 3.2.1, 3.0.0 to 3.0.8, and 2.6.0 to 2.6.14, a flaw in the WiMax DLMAP dissector could cause the application to crash. The issue was resolved by implementing validation for a length field in the affected plugin.

The Impact of CVE-2020-9430

The vulnerability could be exploited by an attacker to crash Wireshark, potentially leading to a denial of service (DoS) condition.

Technical Details of CVE-2020-9430

This section covers the technical aspects of the CVE.

Vulnerability Description

The WiMax DLMAP dissector in the specified Wireshark versions lacked proper validation for a length field, which could result in a crash.

Affected Systems and Versions

Wireshark 3.2.0 to 3.2.1
Wireshark 3.0.0 to 3.0.8
Wireshark 2.6.0 to 2.6.14

Exploitation Mechanism

Attackers could exploit this vulnerability by crafting a malicious WiMax DLMAP packet to trigger the crash.

Mitigation and Prevention

Protecting systems from CVE-2020-9430 requires specific actions.

Immediate Steps to Take

Update Wireshark to the latest patched version.
Avoid opening suspicious Wireshark captures from untrusted sources.

Long-Term Security Practices

Regularly update Wireshark and other software to patch known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Ensure that all Wireshark installations are updated to versions where the vulnerability has been addressed.