CVE-2020-21057 : Vulnerability Insights and Analysis

A Directory Traversal vulnerability in FusionPBX 4.5.7 allows a remote malicious user to delete folders on the system.

Understanding CVE-2020-21057

This CVE involves a security issue in FusionPBX version 4.5.7 that enables unauthorized deletion of folders by exploiting a specific variable.

What is CVE-2020-21057?

The vulnerability in FusionPBX 4.5.7 permits a malicious remote user to delete folders on the system by manipulating the 'folder' variable in app/edit/folderdelete.php.

The Impact of CVE-2020-21057

The exploitation of this vulnerability can lead to unauthorized deletion of critical folders on the system, potentially causing data loss or system instability.

Technical Details of CVE-2020-21057

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability in FusionPBX 4.5.7 allows an attacker to perform directory traversal and delete folders on the system by manipulating the 'folder' variable.

Affected Systems and Versions

Affected Version: FusionPBX 4.5.7
Other versions may also be impacted; users are advised to exercise caution.

Exploitation Mechanism

The vulnerability is exploited by sending crafted requests to the affected application, manipulating the 'folder' variable to delete folders on the system.

Mitigation and Prevention

Protecting systems from CVE-2020-21057 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches or updates provided by FusionPBX promptly.
Implement proper input validation mechanisms to prevent malicious input.
Monitor system logs for any suspicious activities related to folder deletions.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify vulnerabilities proactively.
Educate users and administrators about secure coding practices and the risks of directory traversal attacks.

Patching and Updates

FusionPBX users should regularly check for security updates and apply them as soon as they are available to mitigate the risk of exploitation.