CVE-2025-7054
📋 TL;DR
CVE-2025-7054 is a denial-of-service vulnerability in Cloudflare's quiche QUIC implementation where an unauthenticated attacker can trigger an infinite loop by sending specially crafted RETIRE_CONNECTION_ID frames. This affects systems using quiche versions 0.15.0 through 0.24.4 for QUIC connections, potentially causing resource exhaustion and service disruption.
💻 Affected Systems
- Cloudflare quiche
📦 What is this software?
Quiche by Cloudflare
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of service through CPU exhaustion, causing affected services to become unresponsive and potentially crash.
Likely Case
Degraded performance or temporary service interruption for QUIC connections, requiring restart of affected processes.
If Mitigated
Minimal impact if patched or workarounds applied; connections may drop but services remain functional.
🎯 Exploit Status
Requires attacker to complete QUIC handshake first, then send malicious frames; no authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.24.5 and later
Vendor Advisory: https://github.com/cloudflare/quiche/security/advisories/GHSA-m3hh-f9gh-74c2
Restart Required: No
Instructions:
1. Update quiche to version 0.24.5 or later. 2. Rebuild applications using quiche. 3. Deploy updated applications.
🔧 Temporary Workarounds
Disable QUIC connections
allTemporarily disable QUIC protocol support to prevent exploitation.
Configure applications to use HTTP/2 or HTTP/1.1 instead of HTTP/3/QUIC
Rate limit QUIC connections
allImplement connection rate limiting to reduce attack surface.
Use firewall or load balancer to limit QUIC connection rates
🧯 If You Can't Patch
- Implement network segmentation to isolate QUIC services
- Deploy WAF or IPS with QUIC protocol anomaly detection
🔍 How to Verify
Check if Vulnerable:
Check quiche library version in applications; if version is between 0.15.0 and 0.24.4 inclusive, system is vulnerable.Check Version:
Check application dependencies or build configuration for quiche versionVerify Fix Applied:
Verify quiche version is 0.24.5 or later after update.📡 Detection & Monitoring
Log Indicators:
- High CPU usage on QUIC processes
- Multiple connection resets
- Unusual RETIRE_CONNECTION_ID frame patterns
Network Indicators:
- Excessive QUIC connection attempts
- Abnormal RETIRE_CONNECTION_ID frame sequences
SIEM Query:
Process monitoring for quiche processes showing sustained 100% CPU usage