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Q1What is this vulnerability? (Essence + Consequences)
🚨 **Essence**: HashiCorp Consul suffers from a **Server-Side Request Forgery (SSRF)** vulnerability.…
🛡️ **Root Cause**: The flaw lies in how Consul handles **HTTP health check endpoints**. By default, Consul **follows HTTP redirects** returned by these endpoints without sufficient validation.…
📦 **Affected Products**: HashiCorp Consul & Consul Enterprise. 📅 **Versions**: Up to **1.9.16**, **1.10.9**, and **1.11**. If you are running these versions, you are at risk!
Q4What can hackers do? (Privileges/Data)
💀 **Attacker Capabilities**:
1. 🕵️ **Obtain Sensitive Info**: Access internal services or metadata.
2. 📝 **Modify Data**: Alter configurations or data.
3.…
🔍 **Public Exploit**: Yes. A **Nuclei template** is available on GitHub (projectdiscovery/nuclei-templates). This indicates that **automated scanning** and potential exploitation tools are publicly accessible.
Q7How to self-check? (Features/Scanning)
🔎 **Self-Check**:
1. Check your Consul version against the affected list (≤1.11).
2. Use the provided **Nuclei template** for automated detection.
3. Monitor logs for unusual redirect patterns in health checks.
Q8Is it fixed officially? (Patch/Mitigation)
🩹 **Official Fix**: Yes. HashiCorp has issued a security advisory (**HCSEC-2022-10**). Updates are available. Check the **Fedora** and **NetApp** advisories for specific patch versions.
Q9What if no patch? (Workaround)
🚧 **No Patch Workaround**: If you cannot patch immediately:
1. 🚫 **Disable** automatic redirect following in health checks if configurable.
2. 🔒 **Restrict** access to health check endpoints.
3.…
🔥 **Urgency**: **HIGH**. SSRF vulnerabilities are critical for internal network reconnaissance and data exfiltration. Since PoCs exist, immediate **patching** or **mitigation** is strongly recommended.