CVE-2018-10066 Explained : Impact and Mitigation
Learn about CVE-2018-10066 affecting MikroTik RouterOS 6.41.4. Understand the risk of unauthorized access to internal networks via OpenVPN server impersonation. Find mitigation steps and patching recommendations.
A vulnerability was found in MikroTik RouterOS 6.41.4 that allows unauthorized external attackers to exploit the absence of certificate verification for the OpenVPN server, potentially gaining access to the client's internal network.
Understanding CVE-2018-10066
What is CVE-2018-10066?
This CVE identifies a security flaw in MikroTik RouterOS 6.41.4, where the lack of certificate verification for the OpenVPN server enables malicious actors to impersonate a legitimate server and intercept client traffic.
The Impact of CVE-2018-10066
The vulnerability poses a significant risk as attackers can potentially breach the client's internal network, especially in scenarios like site-to-site tunnels.
Technical Details of CVE-2018-10066
Vulnerability Description
The issue in MikroTik RouterOS 6.41.4 allows remote unauthenticated attackers to act as a deceptive OpenVPN server due to missing certificate verification, leading to unauthorized access to client traffic.
Affected Systems and Versions
- Product: MikroTik RouterOS 6.41.4
- Vendor: MikroTik
- Version: Not Applicable
Exploitation Mechanism
Attackers exploit the vulnerability by setting up a deceptive OpenVPN server, intercepting client traffic, and potentially gaining entry to the client's internal network.
Mitigation and Prevention
Immediate Steps to Take
- Disable OpenVPN services if not essential
- Implement certificate verification for OpenVPN servers
- Monitor network traffic for any suspicious activities
Long-Term Security Practices
- Regularly update and patch MikroTik RouterOS
- Conduct security audits and penetration testing
Patching and Updates
- Apply patches provided by MikroTik to address the vulnerability