CVE-2021-41636 Explained : Impact and Mitigation
Learn about CVE-2021-41636, a vulnerability in MELAG FTP Server 2.2.0.4 that allows attackers to escape the FTP root directory and potentially compromise the entire operating system. Find mitigation steps and prevention measures.
MELAG FTP Server 2.2.0.4 allows an attacker to break out of the root directory using the CWD command, potentially compromising the entire system.
Understanding CVE-2021-41636
What is CVE-2021-41636?
MELAG FTP Server 2.2.0.4 contains a vulnerability that enables attackers to escape the FTP root directory and gain access to the entire operating system, subject to the user's access restrictions.
The Impact of CVE-2021-41636
The vulnerability allows unauthorized users to execute commands outside of the FTP root directory, potentially leading to full system compromise.
Technical Details of CVE-2021-41636
Vulnerability Description
The vulnerability in MELAG FTP Server 2.2.0.4 enables attackers to exploit the CWD command to navigate outside the FTP root directory.
Affected Systems and Versions
- Product: MELAG FTP Server 2.2.0.4
- Vendor: Not applicable
- Versions: Not applicable
Exploitation Mechanism
Attackers can use the CWD command to escape the FTP root directory, giving them access to the whole operating system.
Mitigation and Prevention
Immediate Steps to Take
- Disable or restrict the use of the CWD command in FTP servers.
- Regularly monitor FTP server logs for unusual activities.
- Implement access control measures to restrict unauthorized access.
Long-Term Security Practices
- Conduct regular security assessments and penetration testing on FTP servers.
- Keep FTP server software up to date with the latest security patches.
Patching and Updates
Update MELAG FTP Server to the latest secure version to address the vulnerability.