CVE-2021-44521 — AI Deep Analysis Summary

🚨 **What is this vulnerability?** * **Essence:** Apache Cassandra has a **Code Injection** flaw (CWE-94). * **Mechanism:** Attackers can execute **arbitrary code** on the host machine. * **Consequences:** Full **R…

🛡️ **Root Cause? (CWE/Flaw)** * **CWE ID:** **CWE-94** (Code Injection). * **The Flaw:** Unsafe handling of **User Defined Functions (UDFs)**. * **Specifics:** Specifically affects **Scripted UDFs**. * **Why:** …

👥 **Who is affected? (Versions/Components)** * **Vendor:** Apache Software Foundation. * **Product:** **Apache Cassandra**. * **Type:** Distributed NoSQL database (like BigTable). * **Scope:** Any instance runni…

🕵️ **What can hackers do? (Privileges/Data)** * **Action:** Execute **any command** on the host OS. * **Privileges:** Code runs with the privileges of the **Cassandra process**. * **Data:** Can read, modify, or de…

🔑 **Is exploitation threshold high? (Auth/Config)** * **Config Required:** Must have these settings enabled: 1. `enable_user_defined_functions: true` 2. `enable_scripted_user_defined_functions: true` 3.…

💣 **Is there a public Exp? (PoC/Wild Exploitation)** * **Yes!…

🔍 **How to self-check? (Features/Scanning)** * **Check Config:** Look for `enable_scripted_user_defined_functions: true` in your `cassandra.yaml`. * **Scan:** Use **Nuclei** with the CVE-2021-44521 template. * **V…

🩹 **Is it fixed officially? (Patch/Mitigation)** * **Official Stance:** The configuration is **inherently unsafe**. * **Fix:** There is no simple "patch" for the config itself; you must **disable** the feature. * …

🚧 **What if no patch? (Workaround)** * **Immediate Action:** Set `enable_scripted_user_defined_functions: false`. * **Secondary:** Set `enable_user_defined_functions: false` if possible. * **Access Control:** Rest…

🔥 **Is it urgent? (Priority Suggestion)** * **Priority:** **CRITICAL** (if the unsafe config is active). * **Reason:** RCE is possible with minimal effort. * **Action:** **IMMEDIATE** remediation required. * **R…