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CVE-2024-22189: QUIC's Connection ID Mechanism vulnerable to Memory Exhaustion Attack

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-04 · updated 2026-06-17
• Weakness: CWE-770

Description

quic-go is an implementation of the QUIC protocol in Go. Prior to version 0.42.0, an attacker can cause its peer to run out of memory sending a large number of `NEW_CONNECTION_ID` frames that retire old connection IDs. The receiver is supposed to respond to each retirement frame with a `RETIRE_CONNECTION_ID` frame. The attacker can prevent the receiver from sending out (the vast majority of) these `RETIRE_CONNECTION_ID` frames by collapsing the peers congestion window (by selectively acknowledging received packets) and by manipulating the peer's RTT estimate. Version 0.42.0 contains a patch for the issue. No known workarounds are available.

Affected products

• quic-go: before 0.42.0 — fixed in 0.42.0

How to fix

Upgrade to a fixed version: quic-go 0.42.0. Check the vendor advisory for mitigations.

References

• https://github.com/quic-go/quic-go/commit/4a99b816ae3ab03ae5449d15aac45147c85ed47a
• https://github.com/quic-go/quic-go/security/advisories/GHSA-c33x-xqrf-c478
• https://seemann.io/posts/2024-03-19-exploiting-quics-connection-id-management
• https://www.youtube.com/watch?v=JqXtYcZAtIA&t=3683s
• https://github.com/quic-go/quic-go/commit/4a99b816ae3ab03ae5449d15aac45147c85ed47a
• https://github.com/quic-go/quic-go/security/advisories/GHSA-c33x-xqrf-c478
• https://seemann.io/posts/2024-03-19-exploiting-quics-connection-id-management
• https://www.youtube.com/watch?v=JqXtYcZAtIA&t=3683s

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