CVE-2019-5716 Explained : Impact and Mitigation

Wireshark versions 2.6.0 to 2.6.5 were affected by a bug in the 6LoWPAN dissector that could lead to crashes. The issue was resolved by modifying the packet-6lowpan.c file.

Understanding CVE-2019-5716

This CVE entry pertains to a vulnerability in Wireshark versions 2.6.0 to 2.6.5 related to the 6LoWPAN dissector.

What is CVE-2019-5716?

In Wireshark versions 2.6.0 to 2.6.5, a bug in the 6LoWPAN dissector could cause crashes. The fix involved preventing the use of a TVB before its creation in the packet-6lowpan.c file.

The Impact of CVE-2019-5716

The vulnerability could lead to crashes in Wireshark when processing 6LoWPAN packets, potentially causing denial of service.

Technical Details of CVE-2019-5716

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability in Wireshark versions 2.6.0 to 2.6.5 allowed the 6LoWPAN dissector to crash due to improper handling of a TVB.

Affected Systems and Versions

Wireshark versions 2.6.0 to 2.6.5

Exploitation Mechanism

An attacker could exploit this vulnerability by sending specially crafted 6LoWPAN packets to the affected Wireshark versions, triggering a crash.

Mitigation and Prevention

Protecting systems from CVE-2019-5716 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Wireshark to versions beyond 2.6.5 to mitigate the vulnerability.
Monitor security advisories for any new updates or patches related to Wireshark.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Implement network segmentation to limit the impact of potential exploits.

Patching and Updates

Apply patches provided by Wireshark promptly to ensure the security of the network and systems.