CVE-2017-16155 : What You Need to Know

fast-http-cli is a command line interface vulnerable to a directory traversal issue that allows unauthorized access to the file system.

Understanding CVE-2017-16155

What is CVE-2017-16155?

fast-http-cli, a companion for fast-http web server, has a security vulnerability enabling attackers to access the file system through directory traversal.

The Impact of CVE-2017-16155

This vulnerability permits attackers to gain unauthorized access to sensitive files and directories on the server, potentially leading to data breaches and system compromise.

Technical Details of CVE-2017-16155

Vulnerability Description

The vulnerability in fast-http-cli allows attackers to exploit a directory traversal technique by inserting "../" in the URL, leading to unauthorized access to the file system.

Affected Systems and Versions

Product: fast-http-cli node module
Vendor: HackerOne
Versions: All versions

Exploitation Mechanism

Attackers can manipulate the URL by adding "../" to traverse directories and access files outside the intended directory structure.

Mitigation and Prevention

Immediate Steps to Take

Disable or restrict access to the vulnerable fast-http-cli module.
Implement input validation to sanitize user inputs and prevent directory traversal attacks.

Long-Term Security Practices

Regularly update and patch the fast-http-cli module to address security vulnerabilities.
Conduct security audits and penetration testing to identify and mitigate potential vulnerabilities.

Patching and Updates

Apply patches and updates provided by HackerOne to fix the directory traversal vulnerability in fast-http-cli.