CVE-2018-9258 : Security Advisory and Response

Wireshark 2.4.0 to 2.4.5 TCP dissector crashing issue resolved with data source preservation.

Understanding CVE-2018-9258

What is CVE-2018-9258?

In Wireshark versions 2.4.0 to 2.4.5, a vulnerability in the TCP dissector could lead to crashes, which has been fixed by implementing data source preservation in epan/dissectors/packet-tcp.c.

The Impact of CVE-2018-9258

The vulnerability could cause Wireshark to crash, potentially disrupting network analysis and monitoring activities.

Technical Details of CVE-2018-9258

Vulnerability Description

The issue of the TCP dissector crashing was resolved in Wireshark versions 2.4.0 to 2.4.5 by preserving valid data sources in epan/dissectors/packet-tcp.c.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions: 2.4.0 to 2.4.5

Exploitation Mechanism

The vulnerability could be exploited by crafting a malicious network packet that triggers the TCP dissector crash.

Mitigation and Prevention

Immediate Steps to Take

Update Wireshark to versions 2.4.6 or later to mitigate the vulnerability.
Monitor official Wireshark security advisories for any future updates.

Long-Term Security Practices

Regularly update Wireshark and other network monitoring tools to the latest versions.
Implement network segmentation and access controls to limit the impact of potential vulnerabilities.

Patching and Updates

Apply patches and updates provided by Wireshark promptly to address known security issues.