CVE-2018-19626 Explained : Impact and Mitigation

Wireshark versions 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10 were affected by a bug in the DCOM dissector leading to a crash issue. The problem was resolved by adding '\0' termination in the packet-dcom.c file.

Understanding CVE-2018-19626

This CVE entry addresses a vulnerability in Wireshark that could cause the DCOM dissector to crash.

What is CVE-2018-19626?

In Wireshark versions 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, a bug in the DCOM dissector could trigger a crash. The issue was fixed by including '\0' termination in the packet-dcom.c file.

The Impact of CVE-2018-19626

The vulnerability could lead to a denial of service (DoS) due to the crash caused by the bug in the DCOM dissector.

Technical Details of CVE-2018-19626

This section provides more technical insights into the CVE.

Vulnerability Description

The bug in the DCOM dissector of Wireshark versions 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10 could result in a crash, impacting the availability of the software.

Affected Systems and Versions

Wireshark versions 2.6.0 to 2.6.4
Wireshark versions 2.4.0 to 2.4.10

Exploitation Mechanism

The vulnerability could be exploited by sending specially crafted network packets to the affected Wireshark versions, triggering the crash in the DCOM dissector.

Mitigation and Prevention

Protecting systems from CVE-2018-19626 is crucial to maintaining security.

Immediate Steps to Take

Update Wireshark to the latest version that includes the fix for the DCOM dissector bug.
Avoid opening suspicious or untrusted network captures with vulnerable Wireshark versions.

Long-Term Security Practices

Regularly update Wireshark and other software to patch known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks on Wireshark.

Patching and Updates

Apply security patches provided by Wireshark promptly to address vulnerabilities like the DCOM dissector bug.