CVE-2019-10894 : Exploit Details and Defense Strategies

Wireshark versions 2.4.0 to 2.4.13, 2.6.0 to 2.6.7, and 3.0.0 were susceptible to a crash in the GSS-API dissector. Learn about the impact, technical details, and mitigation steps.

Understanding CVE-2019-10894

This CVE pertains to a vulnerability in Wireshark versions 2.4.0 to 2.4.13, 2.6.0 to 2.6.7, and 3.0.0 that could lead to a crash in the GSS-API dissector.

What is CVE-2019-10894?

In Wireshark versions 2.4.0 to 2.4.13, 2.6.0 to 2.6.7, and 3.0.0, a flaw existed in the GSS-API dissector that could result in a crash. The issue was addressed by modifying the code in epan/dissectors/packet-gssapi.c to ensure the correct dissector is invoked.

The Impact of CVE-2019-10894

The vulnerability could be exploited to cause a crash in Wireshark, potentially leading to a denial of service condition.

Technical Details of CVE-2019-10894

Wireshark versions 2.4.0 to 2.4.13, 2.6.0 to 2.6.7, and 3.0.0 were affected by this vulnerability.

Vulnerability Description

The GSS-API dissector in Wireshark was susceptible to crashing due to improper handling of certain network packets.

Affected Systems and Versions

Wireshark 2.4.0 to 2.4.13
Wireshark 2.6.0 to 2.6.7
Wireshark 3.0.0

Exploitation Mechanism

Attackers could exploit this vulnerability by sending specially crafted network packets to trigger a crash in the GSS-API dissector.

Mitigation and Prevention

To address CVE-2019-10894, follow these mitigation steps:

Immediate Steps to Take

Update Wireshark to the latest patched version.
Avoid opening suspicious or untrusted network captures.
Monitor vendor advisories for security updates.

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 timely installation of security updates and patches provided by Wireshark to mitigate the risk of exploitation.