CVE-2017-16210 : What You Need to Know

The jn_jj_server node module by HackerOne is vulnerable to a directory traversal issue, allowing attackers to gain unauthorized access to the filesystem.

Understanding CVE-2017-16210

The vulnerability was made public on April 26, 2018, and is categorized under Path Traversal (CWE-22).

What is CVE-2017-16210?

The jn_jj_server, designed for hosting static files, contains a flaw that permits attackers to manipulate URLs to access unauthorized parts of the filesystem.

The Impact of CVE-2017-16210

This vulnerability enables attackers to view, modify, or delete files on the server, potentially leading to unauthorized data access or system compromise.

Technical Details of CVE-2017-16210

The following technical aspects are associated with this CVE:

Vulnerability Description

The vulnerability in jn_jj_server allows attackers to perform directory traversal by inserting "../" in the URL, leading to unauthorized file system access.

Affected Systems and Versions

Product: jn_jj_server node module
Vendor: HackerOne
Versions: All versions

Exploitation Mechanism

Attackers exploit the directory traversal vulnerability by manipulating the URL to navigate to sensitive directories outside the intended scope.

Mitigation and Prevention

To address CVE-2017-16210, consider the following steps:

Immediate Steps to Take

Disable or restrict access to the affected server.
Implement input validation to sanitize user-controlled input.
Monitor and analyze server logs for suspicious activities.

Long-Term Security Practices

Regularly update and patch the jn_jj_server module.
Conduct security assessments and penetration testing to identify and remediate vulnerabilities.
Educate developers on secure coding practices to prevent similar issues.
Implement network segmentation to limit the impact of potential breaches.

Patching and Updates

Apply patches provided by HackerOne promptly to address the directory traversal vulnerability.