CVE-2019-16319 : Exploit Details and Defense Strategies

Wireshark versions 3.0.0 to 3.0.3 and 2.6.0 to 2.6.10 were affected by an issue in the Gryphon dissector that could lead to an infinite loop. The problem has been resolved in the mentioned versions by implementing a fix in the packet-gryphon.c file.

Understanding CVE-2019-16319

This CVE entry addresses a vulnerability in Wireshark related to the Gryphon dissector.

What is CVE-2019-16319?

In Wireshark versions 3.0.0 to 3.0.3 and 2.6.0 to 2.6.10, the Gryphon dissector could enter an infinite loop due to a specific issue.

The Impact of CVE-2019-16319

The vulnerability could potentially lead to a denial of service (DoS) situation where the Gryphon dissector gets stuck in an infinite loop, impacting the performance and functionality of Wireshark.

Technical Details of CVE-2019-16319

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The Gryphon dissector in Wireshark versions 3.0.0 to 3.0.3 and 2.6.0 to 2.6.10 could go into an infinite loop, affecting the normal operation of the software.

Affected Systems and Versions

Wireshark 3.0.0 to 3.0.3
Wireshark 2.6.0 to 2.6.10

Exploitation Mechanism

The issue arises from a lack of proper validation for message length, causing the Gryphon dissector to loop infinitely.

Mitigation and Prevention

To address CVE-2019-16319, users and administrators should take the following steps:

Immediate Steps to Take

Update Wireshark to version 3.0.4 or higher to mitigate the vulnerability.
Monitor official security advisories for any future updates or patches related to Wireshark.

Long-Term Security Practices

Regularly update Wireshark and other software to the latest versions to ensure all security patches are applied.
Employ network segmentation and access controls to limit the impact of potential vulnerabilities.

Patching and Updates

Apply patches provided by Wireshark promptly to address known security issues and prevent exploitation of vulnerabilities.