CVE-2021-41638 : Security Advisory and Response
Learn about CVE-2021-41638, a critical vulnerability in MELAG FTP Server version 2.2.0.4 allowing remote attackers to access local files using a valid username. Find mitigation steps and long-term security practices here.
The authentication checks of the MELAG FTP Server in version 2.2.0.4 are incomplete, allowing remote attackers to access local files using a valid username.
Understanding CVE-2021-41638
The CVE-2021-41638 vulnerability pertains to incomplete authentication checks in the MELAG FTP Server version 2.2.0.4, enabling unauthorized access to local files.
What is CVE-2021-41638?
The vulnerability in the MELAG FTP Server version 2.2.0.4 allows remote attackers to exploit incomplete authentication checks, leading to unauthorized access to local files using a valid username.
The Impact of CVE-2021-41638
The security flaw poses a significant risk as it enables attackers to retrieve sensitive information stored on the local file system by leveraging a valid username.
Technical Details of CVE-2021-41638
Vulnerability Description
The issue lies in the insufficient authentication mechanism of the MELAG FTP Server version 2.2.0.4, which fails to adequately verify user credentials, facilitating unauthorized file access.
Affected Systems and Versions
- Affected Systems: MELAG FTP Server version 2.2.0.4
- Affected Versions: 2.2.0.4
Exploitation Mechanism
The vulnerability allows malicious actors to bypass authentication measures and view local files by utilizing a legitimate username.
Mitigation and Prevention
Immediate action is crucial to prevent potential exploitation of this security flaw.
Immediate Steps to Take
- Users should immediately update the MELAG FTP Server to a patched version that addresses the authentication issue.
- Implement network monitoring to detect any unauthorized access attempts.
Long-Term Security Practices
- Enforce strong password policies and implement multi-factor authentication to enhance security.
- Regularly audit and review access controls to ensure only authorized users have appropriate permissions.
Patching and Updates
- Stay informed about security updates provided by the MELAG FTP Server vendor and apply patches promptly to mitigate the vulnerability.