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Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: Apache SkyWalking suffers from a **SQL Injection** flaw in its storage implementations.β¦
π¦ **Affected Versions**: Apache SkyWalking **6.0.0 to 6.6.0** and **7.0.0**. π **Components**: Specifically impacts systems using **H2**, **MySQL**, or **TiDB** as the backend storage.
Q4What can hackers do? (Privileges/Data)
π΅οΈ **Attacker Actions**: Hackers can execute arbitrary SQL commands. π **Impact**: They can **read sensitive data** from the database, potentially exposing trace logs, metrics, or metadata associated with microservices.
Q5Is exploitation threshold high? (Auth/Config)
βοΈ **Exploitation Threshold**: **Low to Medium**. The vulnerability exists in the **GraphQL protocol** interface.β¦
π£ **Public Exploit**: **Yes**. Multiple PoCs are available on GitHub (e.g., `CVE-2020-9483.py`). π **Wild Exploitation**: Automated scanners like **Nuclei** have templates ready, increasing the risk of automated attacks.
Q7How to self-check? (Features/Scanning)
π **Self-Check**: 1. Verify your SkyWalking version (6.0.0-6.6.0, 7.0.0). 2. Check if you are using H2/MySQL/TiDB storage. 3. Scan for exposed GraphQL endpoints. 4.β¦
β **Official Fix**: **Yes**. Apache released patches in later versions (e.g., 8.x+). π **Mitigation**: Upgrade to a patched version immediately. The fix involves properly parameterizing SQL queries in the DAO layer.
Q9What if no patch? (Workaround)
π§ **No Patch Workaround**: 1. **Restrict Network Access**: Block external access to the GraphQL port. 2. **Disable GraphQL**: If not needed, disable the GraphQL query service. 3.β¦
π₯ **Urgency**: **HIGH**. This is a critical SQL injection vulnerability with **public PoCs**. β οΈ **Priority**: Patch immediately if running affected versions. Unpatched systems are at high risk of data exfiltration.