CVE-2023-49295 — quic-go is an implementation of the QUIC protocol (RFC 9000, RFC 9001, RFC 9002)

quic-go is an implementation of the QUIC protocol (RFC 9000, RFC 9001, RFC 9002) in Go. An attacker can cause its peer to run out of memory sending a large number of PATH_CHALLENGE frames. The receiver is supposed to respond to each PATH_CHALLENGE frame with a PATH_RESPONSE frame

01What is this vulnerability?

quic-go is an implementation of the QUIC protocol (RFC 9000, RFC 9001, RFC 9002) in Go. An attacker can cause its peer to run out of memory sending a large number of PATH_CHALLENGE frames. The receiver is supposed to respond to each PATH_CHALLENGE frame with a PATH_RESPONSE frame. The attacker can prevent the receiver from sending out (the vast majority of) these PATH_RESPONSE frames by…

02Affected products

Vendor	Product	Versions
quic-go	quic	go — = 0.40.0, >= 0.39.0, < 0.39.4, >= 0.38.0, < 0.38.2, < 0.37.7

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-01-10T21:40:58.881Z
• Last modified: 2025-06-17T20:59:15.978Z

09References

• github.com — https://github.com/quic-go/quic-go/security/advisories/GHSA-ppxx-5m9h-6vxf
• github.com — https://github.com/quic-go/quic-go/commit/17fc98c2d81dbe685c19702dc694a9d606ac56…
• github.com — https://github.com/quic-go/quic-go/commit/21609ddfeff93668c7625a85eb09f1541fdad9…
• github.com — https://github.com/quic-go/quic-go/commit/3a9c18bcd27a01c551ac9bf8bd2b4bded77c18…
• github.com — https://github.com/quic-go/quic-go/commit/554d543b50b917369fb1394cc5396d928166cf…
• github.com — https://github.com/quic-go/quic-go/commit/6cc3d58935426191296171a6c0d1ee965e1053…
• github.com — https://github.com/quic-go/quic-go/commit/9aaefe19fc3dc8c8917cc87e6128bb56d9e9e6…
• github.com — https://github.com/quic-go/quic-go/commit/a0ffa757499913f7be69aa78f573a6aee3430a…
• github.com — https://github.com/quic-go/quic-go/commit/d7aa627ebde91cf799ada2a07443faa9b1e5ab…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…