CVE-2017-6430 : What You Need to Know

A crafted filter can cause a denial of service (out-of-bounds read) in the compile_tree function of ef_compiler.c, which is part of the Etterfilter utility in Ettercap 0.8.2 and previous versions, when executed remotely by attackers.

Understanding CVE-2017-6430

This CVE involves a vulnerability in the Etterfilter utility in Ettercap versions 0.8.2 and earlier, allowing remote attackers to trigger a denial of service through a specific crafted filter.

What is CVE-2017-6430?

The CVE-2017-6430 vulnerability is an out-of-bounds read issue in the compile_tree function of ef_compiler.c within the Etterfilter utility of Ettercap versions 0.8.2 and prior. Attackers can exploit this remotely to cause a denial of service.

The Impact of CVE-2017-6430

Attackers can remotely trigger a denial of service by exploiting this vulnerability.

Technical Details of CVE-2017-6430

The technical details of the CVE-2017-6430 vulnerability are as follows:

Vulnerability Description

The compile_tree function in ef_compiler.c in the Etterfilter utility in Ettercap 0.8.2 and earlier allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted filter.

Affected Systems and Versions

Ettercap 0.8.2 and previous versions

Exploitation Mechanism

Attackers can exploit this vulnerability remotely by using a specifically crafted filter.

Mitigation and Prevention

To address CVE-2017-6430, consider the following mitigation strategies:

Immediate Steps to Take

Update Ettercap to the latest version to patch the vulnerability.
Monitor network traffic for any suspicious activity that could indicate an exploit attempt.

Long-Term Security Practices

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

Patching and Updates

Apply security patches and updates provided by Ettercap to fix the vulnerability.