CVE-2019-20918 : Security Advisory and Response

A vulnerability has been identified in InspIRCd 3 before version 3.1.0, affecting the silence module and leading to a use after free vulnerability.

Understanding CVE-2019-20918

This CVE pertains to a specific vulnerability in the InspIRCd server software.

What is CVE-2019-20918?

CVE-2019-20918 is a use after free vulnerability in the silence module of InspIRCd 3 before version 3.1.0. This flaw allows an attacker with complete access to a server to remotely crash an InspIRCd server.

The Impact of CVE-2019-20918

Exploiting this vulnerability can result in a remote crash of an InspIRCd server by any user who has full access to the server.

Technical Details of CVE-2019-20918

This section provides more technical insights into the CVE.

Vulnerability Description

The silence module in InspIRCd 3 before version 3.1.0 is susceptible to a use after free vulnerability, enabling a remote crash of the server.

Affected Systems and Versions

Product: InspIRCd 3
Versions affected: Before 3.1.0

Exploitation Mechanism

The vulnerability can be exploited by any user with complete access to the server, allowing them to cause a remote crash of the InspIRCd server.

Mitigation and Prevention

Protecting systems from CVE-2019-20918 is crucial to maintaining security.

Immediate Steps to Take

Upgrade InspIRCd to version 3.1.0 or newer to mitigate the vulnerability.
Monitor for any unusual server behavior that could indicate exploitation.

Long-Term Security Practices

Regularly update and patch server software to prevent known vulnerabilities.
Implement access controls to limit user privileges and reduce the impact of potential attacks.

Patching and Updates

Apply patches and updates provided by InspIRCd promptly to address security issues and enhance system protection.