The write-up provided describes a detailed walkthrough of exploiting vulnerabilities within a web application and server environment to achieve privilege escalation. Here's a summary of each step in the attack chain:
1. Authentication Bypass via NoSQL Injection
- Vulnerability: The login form is vulnerable to NoSQL injection due to improper handling of query parameters.
- Technique: By injecting a
$neoperator, the attacker bypasses authentication checks and gains unauthorized access.
2. Remote Code Execution (RCE) through Server-Side Template Injection
- Vulnerability: The application uses EJS templates without proper sanitization or validation.
- Technique: Injecting malicious JavaScript code into a template parameter allows for arbitrary command execution on the server.
3. Local Reconnaissance
- Technique: Using
ps auxto identify running processes and their associated environment variables, including debug ports exposed by Node.js applications.
4. Pivot via SSH Port Forwarding
- Technique: Setting up an SSH tunnel to forward traffic from a local port to the target's internal service (Node Inspector).
5. RCE on Service via Node.js Inspector Protocol
- Vulnerability: The
Read the full article at InfoSec Write-ups - Medium
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