CVE-2019-3943 : Security Advisory and Response

MikroTik RouterOS versions Stable 6.43.12 and below, Long-term 6.42.12 and below, and Testing 6.44beta75 and below are vulnerable to an authenticated, remote directory traversal attack via HTTP or Winbox interfaces. This allows attackers to access and modify files outside the sandbox directory (/rw/disk).

Understanding CVE-2019-3943

This CVE identifies a directory traversal vulnerability in MikroTik RouterOS versions, potentially leading to unauthorized access and modification of files.

What is CVE-2019-3943?

CVE-2019-3943 is a security vulnerability in MikroTik RouterOS that allows authenticated remote attackers to perform directory traversal attacks via HTTP or Winbox interfaces.

The Impact of CVE-2019-3943

The vulnerability enables attackers to read and write files outside the designated sandbox directory, compromising the integrity and confidentiality of the system.

Technical Details of CVE-2019-3943

MikroTik RouterOS versions are susceptible to a directory traversal exploit, allowing unauthorized access to sensitive files.

Vulnerability Description

The vulnerability in MikroTik RouterOS versions allows authenticated remote attackers to perform directory traversal attacks via HTTP or Winbox interfaces.

Affected Systems and Versions

Product: RouterOS
Vendor: MikroTik
Versions Affected: Stable 6.43.12 and below, Long-term 6.42.12 and below, Testing 6.44beta75 and below

Exploitation Mechanism

Attackers can exploit this vulnerability through the HTTP or Winbox interfaces, bypassing security measures to access and manipulate files outside the sandbox directory.

Mitigation and Prevention

To address CVE-2019-3943, users should take immediate action and implement long-term security practices.

Immediate Steps to Take

Update RouterOS to the latest version that includes a patch for the vulnerability.
Restrict access to the HTTP and Winbox interfaces to trusted users only.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent known vulnerabilities.
Implement network segmentation to limit the impact of potential breaches.
Conduct security audits and penetration testing to identify and address security weaknesses.

Patching and Updates

Ensure timely installation of security patches provided by MikroTik for RouterOS.
Stay informed about security advisories and updates from MikroTik to protect against emerging threats.