CVE-2017-15377 : Vulnerability Insights and Analysis

Suricata versions prior to 4.x had a vulnerability that allowed repetitive inspections on network traffic content, potentially leading to performance issues.

Understanding CVE-2017-15377

This CVE describes a flaw in Suricata versions before 4.x that could result in excessive content inspections on network traffic.

What is CVE-2017-15377?

In Suricata versions before 4.x, a specific signature could trigger redundant content inspections on network traffic due to a flaw in DetectEngineContentInspection.

The Impact of CVE-2017-15377

The vulnerability could lead to performance degradation and resource consumption as the search engine continued redundant checks on network traffic content.

Technical Details of CVE-2017-15377

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The issue stemmed from the DetectEngineContentInspection functionality in Suricata, which failed to terminate the search engine when no match was found, causing it to reach the default inspection-recursion-limit of 3000.

Affected Systems and Versions

Suricata versions prior to 4.x

Exploitation Mechanism

Crafting network traffic with a specific signature to trigger redundant content inspections

Mitigation and Prevention

Protecting systems from CVE-2017-15377 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Suricata to version 4.x or newer to mitigate the vulnerability
Monitor network traffic for any suspicious activities

Long-Term Security Practices

Regularly update and patch Suricata and other security software
Implement network segmentation and access controls to limit the impact of potential vulnerabilities

Patching and Updates

Apply patches and updates provided by Suricata to address the vulnerability