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Bug bounty hunters often focus on traditional SQL injection, but NoSQL injection can be just as dangerous—if not more—due to its less understood nature. This article dives into NoSQL injection techniques, detection methods, and exploitation strategies.
You Should Know:
1. NoSQL Injection Basics
NoSQL databases (e.g., MongoDB, CouchDB) handle queries differently than SQL. Attackers manipulate input parameters to bypass authentication or extract data.
Example Attack:
curl 'http://example.com/api/user?username[$ne]=nonexistent'
This query retrieves users where `username` is not equal to “nonexistent,” potentially exposing unauthorized records.
2. Common NoSQL Operators for Exploitation
– `$ne` (Not Equal)
– `$gt` (Greater Than)
– `$regex` (Regular Expression)
– `$where` (Arbitrary JavaScript Execution)
Exploit Payloads:
Bypass login using $ne /api/login?user[$ne]=admin&pass[$exists]=true Extract data using $regex /api/search?name[$regex]=^a
3. Automating NoSQL Injection Testing
Use Burp Suite or NoSQLMap for detection:
git clone https://github.com/codingo/NoSQLMap.git cd NoSQLMap python nosqlmap.py -u http://example.com/api --test
4. Bypassing WAFs
NoSQL payloads often evade traditional WAFs:
Obfuscated payload
/api/data?query={"$where": "this.admin == true"}
5. Mitigation Techniques
- Input Validation: Sanitize query parameters.
- Use ORMs: Libraries like Mongoose (Node.js) prevent injection.
- Disable JavaScript Execution: Disable `$where` and `$function` in MongoDB.
What Undercode Say
NoSQL injection is a growing threat as more apps adopt NoSQL databases. Traditional security tools often miss these flaws, making manual testing crucial. Hunters should:
– Test all input fields with NoSQL payloads.
– Use tools like NoSQLMap for automation.
– Monitor for unusual database behavior.
Prediction
As NoSQL databases gain popularity, injection attacks will rise—especially in APIs. Future WAFs will need NoSQL-specific rules.
Expected Output:
- NoSQL Injection Video: Watch Here
- NoSQL Exploitation Cheatsheet: GitHub Repo
- Practice Lab: Try HackMe’s NoSQL Injection Room
This article provides actionable NoSQL injection techniques for bug hunters. Test responsibly! 🚀
References:
Reported By: Faiyaz Ahmad – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
