CVE-2017-7747 : Vulnerability Insights and Analysis

Wireshark versions 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11 were susceptible to a crash in the PacketBB dissector due to packet injection or malformed capture files. The issue has been resolved by limiting protocol tree additions.

Understanding CVE-2017-7747

This CVE entry addresses a vulnerability in Wireshark versions 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11 that could lead to a crash in the PacketBB dissector.

What is CVE-2017-7747?

In Wireshark versions 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11, a crash could occur in the PacketBB dissector when triggered by packet injection or a malformed capture file.

The Impact of CVE-2017-7747

The vulnerability could result in a denial of service (DoS) condition due to the crash caused by specific packet injections or malformed capture files.

Technical Details of CVE-2017-7747

Wireshark vulnerability details and affected systems.

Vulnerability Description

The crash in the PacketBB dissector was mitigated by restricting additions to the protocol tree in the epan/dissectors/packet-packetbb.c file.

Affected Systems and Versions

Wireshark versions 2.2.0 to 2.2.5
Wireshark versions 2.0.0 to 2.0.11

Exploitation Mechanism

The crash was triggered by packet injection or a malformed capture file, leading to a DoS condition.

Mitigation and Prevention

Steps to address and prevent the CVE-2017-7747 vulnerability.

Immediate Steps to Take

Update Wireshark to the latest patched version.
Avoid opening suspicious or untrusted capture files.

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 address vulnerabilities.