CVE-2024-30255 — AI Deep Analysis Summary

🚨 **Essence**: Envoy suffers from **CPU Exhaustion** due to HTTP/2 frame flooding. 📉 **Consequences**: Service degradation, high CPU usage, potential **Denial of Service (DoS)**.…

🛡️ **Root Cause**: **CWE-390** (Detection of Error Condition Without Action). The HTTP/2 codec fails to limit the number of **CONTINUATION frames**.…

📦 **Affected Products**: Envoy Proxy. 📅 **Vulnerable Versions**: <br>• 1.29.3 (Before) <br>• 1.28.2 (Before) <br>• 1.27.4 (Before) <br>• 1.26.8 (Before). ✅ **Safe**: Versions equal to or newer than these are patched.

🕵️ **Attacker Actions**: Hackers can flood the server with **CONTINUATION frames**. 🚫 **Privileges**: No authentication needed. 📊 **Impact**: **Availability** impact (Low CVSS A:L).…

🔓 **Exploitation Threshold**: **LOW**. 🌐 **Network**: Remote (AV:N). 🔑 **Auth**: None required (PR:N). 🖱️ **User Interaction**: None (UI:N). 🎯 **Complexity**: Low (AC:L). Easy to exploit remotely.

💻 **Public Exploit**: **YES**. A Python PoC is available on GitHub (blackmagic2023). 📝 **Description**: Demonstrates CPU exhaustion via CONTINUATION frame flood.…

🔍 **Self-Check**: Scan for Envoy versions < 1.26.8/1.27.4/1.28.2/1.29.3. 📡 **Monitoring**: Watch for abnormal CPU spikes correlated with HTTP/2 traffic.…

🩹 **Official Fix**: **YES**. Patched in: <br>• Envoy 1.29.3 <br>• Envoy 1.28.2 <br>• Envoy 1.27.4 <br>• Envoy 1.26.8. 📢 **Source**: GitHub Security Advisory (GHSA-j654-3ccm-vfmm).

🚧 **No Patch Workaround**: Implement rate limiting on HTTP/2 CONTINUATION frames at the network edge (WAF/Load Balancer). 🛑 **Mitigation**: Block or throttle excessive HTTP/2 control frames from untrusted sources.…

⚡ **Urgency**: **HIGH**. 🚨 **Priority**: Immediate patching recommended. CVSS 3.1 vector indicates remote, low-complexity exploitation.…