Update module github.com/quic-go/quic-go to v0.57.0 [SECURITY] #244
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ℹ️ Artifact update noticeFile name: go.modIn order to perform the update(s) described in the table above, Renovate ran the
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This PR contains the following updates:
v0.55.0->v0.57.0quic-go HTTP/3 QPACK Header Expansion DoS
CVE-2025-64702 / GHSA-g754-hx8w-x2g6
More information
Details
Summary
An attacker can cause excessive memory allocation in quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes into a large header field section (many unique header names and/or large values). The implementation builds an
http.Header(used on thehttp.Requestandhttp.Response, respectively), while only enforcing limits on the size of the (QPACK-compressed) HEADERS frame, but not on the decoded header, leading to memory exhaustion.Impact
A misbehaving or malicious peer can cause a denial-of-service (DoS) attack on quic-go's HTTP/3 servers or clients by triggering excessive memory allocation, potentially leading to crashes or exhaustion. It affects both servers and clients due to symmetric header construction.
Details
In HTTP/3, headers are compressed using QPACK (RFC 9204). quic-go's HTTP/3 server (and client) decodes the QPACK-encoded HEADERS frame into header fields, then constructs an http.Request (or response).
http3.Server.MaxHeaderBytesandhttp3.Transport.MaxResponseHeaderBytes, respectively, limit encoded HEADERS frame size (default: 1 MB server, 10 MB client), but not decoded size. A maliciously crafted HEADERS frame can expand to ~50x the encoded size using QPACK static table entries with long names / values.RFC 9114 requires enforcing decoded field section size limits via SETTINGS, which quic-go did not do.
The Fix
quic-go now enforces RFC 9114 decoded field section size limits, sending SETTINGS_MAX_FIELD_SECTION_SIZE and using incremental QPACK decoding to check the header size after each entry, aborting early on violations with HTTP 431 (on the server side) and stream reset (on the client side).
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
Release Notes
quic-go/quic-go (github.com/quic-go/quic-go)
v0.57.0Compare Source
This release reworks the HTTP/3 header processing logic:
Breaking Changes
Transport.MaxResponseBytesis now anint(before:int64): #5433Notable Fixes
What's Changed
New Contributors
Full Changelog: quic-go/quic-go@v0.56.0...v0.57.0
v0.56.0Compare Source
This release introduces qlog support for HTTP/3 (#5367, #5372, #5374, #5375, #5376, #5381, #5383).
For this, we completely changed how connection tracing works. Instead of a general-purpose
logging.ConnectionTracer(which we removed entirely), we now have a qlog-specific tracer (#5356, #5417). quic-go users can now implement their own qlog events.It also removes the Prometheus-based metrics collection. Please comment on the tracking issue (#5294) if you rely on metrics and are interested in seeing metrics brought back in a future release.
Notable Changes
Behind the Scenes
Go 1.25 introduced support for testing concurrent code using
testing/synctest. We've been working on transitioning tests to use synctest (#5357, #5391, #5393, #5397, #5398, #5403, #5414, #5415), using @MarcoPolo's simnet package to simulate a network in memory.Using synctest makes test execution more reliable (reducing flakiness). The use of a synthetic clock leads to a massive speedup; the execution time of some integration tests was reduced from 20s to less than 1ms. The work will continue for the next release (see tracking issue: #5386).
Changelog
New Contributors
Full Changelog: quic-go/quic-go@v0.55.0...v0.56.0
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