webmedium

Token Trust

hackerdna

Task: OAuth 2.0 authentication portal with exposed config endpoint. Solution: Extract client credentials from /api/v1/config, use client_credentials grant to mint admin JWT token, access /admin panel.

$ ls tags/ techniques/

jwt authentication_bypass credential_leak information_disclosure token_forgery oauth2 client_credentials api_misconfiguration

OAuth client_credentials grant abuseCredential extraction from exposed config endpointJWT admin token mintingrobots.txt endpoint enumerationAPI version discovery

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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