CVE-2020-26299 : Exploit Details and Defense Strategies

ftp-srv is an open-source FTP server with a path-traversal vulnerability in versions prior to 4.4.0, allowing users to escape defined root folders on Windows systems.

Understanding CVE-2020-26299

ftp-srv has a path-traversal vulnerability that enables users to bypass root folder restrictions on Windows machines.

What is CVE-2020-26299?

The vulnerability in ftp-srv versions before 4.4.0 allows malicious users to navigate beyond their designated root folder using specific FTP commands.

The Impact of CVE-2020-26299

The vulnerability poses a medium severity risk with a CVSS base score of 6.3, affecting integrity by allowing unauthorized access beyond the root folder.

Technical Details of CVE-2020-26299

ftp-srv vulnerability details and affected systems.

Vulnerability Description

Path-traversal vulnerability in ftp-srv versions < 4.4.0
Users can escape root folders on Windows systems

Affected Systems and Versions

Product: ftp-srv
Vendor: autovance
Versions Affected: < 4.4.0

Exploitation Mechanism

Malicious users exploit FTP commands like CWD and UPDR
Windows separators (

\

) allow users to move beyond root folders

Mitigation and Prevention

Steps to address and prevent the vulnerability.

Immediate Steps to Take

Update ftp-srv to version 4.4.0 or later
Monitor FTP server logs for suspicious activities

Long-Term Security Practices

Implement access controls and restrictions on FTP servers
Regularly audit and review FTP server configurations

Patching and Updates

Apply patches and updates promptly to mitigate vulnerabilities