CVE-2021-26919 — AI Deep Analysis Summary

🚨 **Essence**: Apache Druid 0.20.2 has a critical security flaw. 📉 **Consequences**: Attackers can execute **arbitrary code** within the Druid server's MySQL process.…

🔍 **Root Cause**: The vulnerability stems from insecure handling of JDBC connection properties. 🛠️ Specifically, it allows malicious MySQL database systems to inject code.…

🎯 **Affected**: Apache Druid versions **0.20.2** and likely earlier versions in the 0.20.x series. 🏢 **Vendor**: Apache Software Foundation. ☕ **Tech**: Java-based, column-oriented open-source distributed database.

💣 **Attacker Actions**: Execute **arbitrary code** on the server. 🔓 **Privileges**: Likely high-level access depending on the Druid process user.…

⚖️ **Threshold**: **Medium/High**. The description mentions "Authenticated users" in references. 🔑 **Auth**: Requires authentication to exploit.…

🌐 **Public Exp?**: Yes. 📄 **PoC**: Available on GitHub (Threekiii/Awesome-POC). 🔥 **Status**: Active exploitation is possible given the public proof-of-concept.

🔎 **Self-Check**: Scan for Apache Druid instances. 📋 **Verify Version**: Check if running version **0.20.2**. 🛡️ **Monitor**: Look for unusual JDBC connections to suspicious MySQL endpoints.

✅ **Fixed**: Yes. 📅 **Date**: Patched around March/April 2021. 🔄 **Solution**: Apache merged pull requests to implement an **allowlist** for JDBC connection properties.…

🚧 **No Patch?**: Implement strict **Allowlists** for JDBC connection properties. 🚫 **Block**: Prevent connections to untrusted MySQL databases. 🛡️ **Network**: Restrict outbound connections from Druid servers.

🔥 **Urgency**: **HIGH**. 🚨 **Priority**: Immediate patching required. ⏳ **Risk**: Active PoC exists, and RCE is a critical threat. 📢 **Recommendation**: Update immediately to mitigate severe compromise risks.