CVE-2018-19623 : Security Advisory and Response

Wireshark versions 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10 were vulnerable to crashing due to issues in the LBMPDM dissector. Attackers could exploit this to write arbitrary data to memory locations. The problem was addressed by restricting specific negative values in the packet-lbmpdm.c file.

Understanding CVE-2018-19623

This CVE entry highlights a vulnerability in Wireshark that could lead to crashes and memory manipulation by external entities.

What is CVE-2018-19623?

The LBMPDM dissector in Wireshark versions 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10 was susceptible to crashing, allowing attackers to write arbitrary data to memory locations preceding packet-scoped memory.

The Impact of CVE-2018-19623

The vulnerability could result in crashes and potential memory manipulation by unauthorized entities, posing a risk to system integrity and data confidentiality.

Technical Details of CVE-2018-19623

Wireshark's LBMPDM dissector vulnerability is further detailed below.

Vulnerability Description

The LBMPDM dissector in Wireshark versions 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10 could crash, and attackers could write arbitrary data to memory locations preceding packet-scoped memory.

Affected Systems and Versions

Wireshark versions 2.6.0 to 2.6.4
Wireshark versions 2.4.0 to 2.4.10

Exploitation Mechanism

Attackers could exploit the LBMPDM dissector vulnerability to crash Wireshark and manipulate memory locations by writing arbitrary data.

Mitigation and Prevention

Protect your systems from CVE-2018-19623 with the following steps.

Immediate Steps to Take

Update Wireshark to the latest version to patch the vulnerability.
Monitor network traffic for any suspicious activities that could indicate exploitation.

Long-Term Security Practices

Regularly update and patch all software to prevent known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Apply security patches promptly to ensure that known vulnerabilities are addressed and system integrity is maintained.