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How the CVE Works
Cloudflare quiche, a QUIC protocol implementation, is vulnerable to an infinite loop when processing RETIRE_CONNECTION_ID frames. QUIC connections use connection identifiers (CIDs) with sequence numbers for synchronization. An attacker completes a handshake and sends malicious frames forcing the victim to retire CIDs. Due to RFC 9000 Section 19.16, a packet cannot retire its own CID, but path migration allows cross-path retirement. The quiche design flaw permits self-referential retirement, causing an infinite loop, consuming CPU indefinitely.
DailyCVE Form
Platform: Cloudflare quiche
Version: < 0.24.5
Vulnerability: Infinite Loop
Severity: Critical
Date: 2024-XX-XX
Prediction: Patch expected Q2 2024
What Undercode Say
git clone https://github.com/cloudflare/quiche cd quiche git checkout 0.24.5 cargo build --release
How Exploit
1. Complete QUIC handshake.
2. Craft RETIRE_CONNECTION_ID frames.
3. Force cross-path retirement.
4. Trigger infinite loop.
Protection from this CVE
- Update to quiche 0.24.5+.
- Disable path migration if unused.
Impact
- CPU exhaustion.
- Denial-of-Service (DoS).
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Sources:
Reported By: github.com
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