CVE-2017-20149 : Exploit Details and Defense Strategies

In versions prior to Stable 6.38.5 and Long-term 6.37.5, also known as Chimay-Red, the Mikrotik RouterOS web server is susceptible to memory corruption. This vulnerability can be exploited by an unauthorized user remotely, without authentication, through the transmission of a specifically crafted HTTP request. By leveraging this vulnerability, an attacker could execute unauthorized code on the compromised system. This exploit was identified in the wild during mid-2017 and has been observed since then.

Understanding CVE-2017-20149

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2017-20149.

What is CVE-2017-20149?

CVE-2017-20149 refers to a memory corruption vulnerability in Mikrotik RouterOS web server versions prior to Stable 6.38.5 and Long-term 6.37.5, also known as Chimay-Red. This vulnerability allows remote unauthorized users to execute arbitrary code on the affected system by sending a specially crafted HTTP request.

The Impact of CVE-2017-20149

The exploitation of CVE-2017-20149 can have severe consequences:

Unauthorized remote code execution on the compromised system
Potential compromise of sensitive data
Complete system takeover by malicious actors

Technical Details of CVE-2017-20149

Let's delve into the technical aspects of this vulnerability.

Vulnerability Description

The vulnerability in Mikrotik RouterOS web server allows unauthorized remote users to trigger memory corruption by sending a specific HTTP request, leading to potential code execution on the target system.

Affected Systems and Versions

Vendor: Mikrotik
Product: RouterOS
Affected Versions: Versions prior to Stable 6.38.5 and Long-term 6.37.5 (Chimay-Red)

Exploitation Mechanism

The vulnerability can be exploited remotely by sending a crafted HTTP request without the need for authentication, enabling attackers to execute arbitrary code on the vulnerable system.

Mitigation and Prevention

Protecting systems from CVE-2017-20149 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Mikrotik RouterOS to Stable 6.38.5 or Long-term 6.37.5 to mitigate the vulnerability
Implement network segmentation to limit the impact of potential attacks

Long-Term Security Practices

Regularly monitor and audit network traffic for suspicious activities
Conduct security training for employees to raise awareness about phishing and social engineering attacks

Patching and Updates

Stay informed about security updates and patches released by Mikrotik
Apply patches promptly to ensure the system is protected against known vulnerabilities