CVE-2019-3924 : Exploit Details and Defense Strategies

CVE-2019-3924 was published on February 12, 2019, and affects MikroTik RouterOS versions prior to 6.43.12 for stable and 6.42.12 for long-term. This vulnerability allows remote attackers to execute user-specified network requests on WAN and LAN clients, potentially bypassing the router's firewall.

Understanding CVE-2019-3924

This CVE involves an intermediary vulnerability in MikroTik RouterOS, enabling unauthorized network requests execution.

What is CVE-2019-3924?

The vulnerability in MikroTik RouterOS versions before 6.43.12 for stable and 6.42.12 for long-term allows remote attackers to execute specific network requests on both WAN and LAN clients without authentication.

The Impact of CVE-2019-3924

Exploiting this vulnerability can lead to bypassing the router's firewall and conducting network scanning activities without proper authorization.

Technical Details of CVE-2019-3924

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw in MikroTik RouterOS versions prior to 6.43.12 for stable and 6.42.12 for long-term allows remote unauthorized users to execute network requests on WAN and LAN clients.

Affected Systems and Versions

Product: MikroTik RouterOS
Vendor: Tenable
Vulnerable Versions: RouterOS long-term 6.42.11 and below, RouterOS stable 6.43.11 and below

Exploitation Mechanism

By exploiting this vulnerability, remote attackers can bypass the router's firewall or perform network scanning activities without authentication.

Mitigation and Prevention

To address CVE-2019-3924, follow these mitigation and prevention strategies:

Immediate Steps to Take

Update MikroTik RouterOS to version 6.43.12 for stable and 6.42.12 for long-term to patch the vulnerability.
Implement firewall rules to restrict unauthorized network requests.

Long-Term Security Practices

Regularly monitor network traffic for suspicious activities.
Conduct security audits to identify and address potential vulnerabilities.

Patching and Updates

Stay informed about security updates for MikroTik RouterOS and apply patches promptly to prevent exploitation of known vulnerabilities.