CVE-2019-5717 : Vulnerability Insights and Analysis

Wireshark versions 2.6.0 to 2.6.5 and 2.4.0 to 2.4.11 were susceptible to a crash due to a vulnerability in the P_MUL dissector. The issue was resolved by rejecting invalid sequence numbers.

Understanding CVE-2019-5717

This CVE entry pertains to a vulnerability in Wireshark that could lead to a crash.

What is CVE-2019-5717?

The P_MUL dissector in Wireshark versions 2.6.0 to 2.6.5 and 2.4.0 to 2.4.11 had a flaw that could potentially cause a crash. The vulnerability was addressed by updating the code to reject zero sequence numbers, which were deemed invalid.

The Impact of CVE-2019-5717

The vulnerability could be exploited to crash Wireshark instances, potentially leading to denial of service.

Technical Details of CVE-2019-5717

This section covers the technical aspects of the CVE.

Vulnerability Description

The vulnerability in Wireshark versions 2.6.0 to 2.6.5 and 2.4.0 to 2.4.11 allowed the P_MUL dissector to crash due to invalid sequence numbers.

Affected Systems and Versions

Wireshark versions 2.6.0 to 2.6.5
Wireshark versions 2.4.0 to 2.4.11

Exploitation Mechanism

Attackers could exploit this vulnerability by sending specially crafted network packets to trigger a crash in Wireshark.

Mitigation and Prevention

Protecting systems from CVE-2019-5717 involves taking immediate and long-term security measures.

Immediate Steps to Take

Update Wireshark to the latest version that includes the patch for CVE-2019-5717.
Monitor network traffic for any suspicious activity that could indicate exploitation of the vulnerability.

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 systems running Wireshark are updated with the latest security patches to mitigate the risk of exploitation.