CVE-2019-20933 — AI Deep Analysis Summary

🚨 **Essence**: InfluxDB < 1.7.6 has an **Authentication Bypass** flaw. 📉 **Consequences**: Attackers can bypass login, access sensitive data, modify time-series data, and execute unauthorized admin ops.…

🛡️ **Root Cause**: The JWT token validation logic in `services/httpd/handler.go` is flawed. 🔍 **Flaw**: It allows a JWT token with an **empty SharedSecret** (shared secret) to be accepted as valid.…

📦 **Affected**: Influxdata InfluxDB. 📅 **Versions**: All versions **before 1.7.6**. (Note: 1.7.6+ is patched). 🌐 **Component**: HTTP Service Handler / Authentication Module.

💀 **Privileges**: Full authentication bypass. 📂 **Data Access**: Can read/write any data in the database. ⚙️ **Actions**: Execute administrative operations.…

⚡ **Threshold**: **LOW**. 🚪 **Auth**: No valid credentials needed. Just send a crafted JWT with an empty secret. 📝 **Config**: Works if the default or misconfigured empty secret is used. Very easy to exploit!

🔥 **Public Exp?**: **YES**. Multiple PoCs exist on GitHub (e.g., LorenzoTullini, Hydragyrum). 🛠️ **Tools**: Automated scanners like Nuclei have templates. Wild exploitation is highly likely.

🔍 **Self-Check**: Use Nuclei template `CVE-2019-20933.yaml`. 🧪 **Manual**: Try sending a JWT with empty payload/secret to the `/query` endpoint. If it returns data without 401/403, you're vulnerable! 🚨

✅ **Fixed**: **YES**. Official patch released in **InfluxDB 1.7.6**. 📝 **Commit**: See GitHub commit 761b557315ff9c1642cf3b0e5797cd3d983a24c0. Update immediately!

🚧 **No Patch?**: **Workaround**: Disable HTTP API if not needed. 🛑 **Network**: Restrict access to port 8086 via firewall.…

🔴 **Urgency**: **CRITICAL**. 🚀 **Priority**: Patch NOW. Since it's an auth bypass with public exploits, your data is at immediate risk. Don't wait! 🏃‍♂️💨