CVE-2023-39326

NameCVE-2023-39326
DescriptionA malicious HTTP sender can use chunk extensions to cause a receiver reading from a request or response body to read many more bytes from the network than are in the body. A malicious HTTP client can further exploit this to cause a server to automatically read a large amount of data (up to about 1GiB) when a handler fails to read the entire body of a request. Chunk extensions are a little-used HTTP feature which permit including additional metadata in a request or response body sent using the chunked encoding. The net/http chunked encoding reader discards this metadata. A sender can exploit this by inserting a large metadata segment with each byte transferred. The chunk reader now produces an error if the ratio of real body to encoded bytes grows too small.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
golang-1.11 (PTS)buster1.11.6-1+deb10u4vulnerable
buster (security)1.11.6-1+deb10u7vulnerable
golang-1.15 (PTS)bullseye1.15.15-1~deb11u4vulnerable
golang-1.19 (PTS)bookworm1.19.8-2vulnerable
golang-1.20 (PTS)trixie1.20.13-1fixed
sid1.20.14-1fixed
golang-1.21 (PTS)sid, trixie1.21.7-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
golang-1.11source(unstable)(unfixed)
golang-1.15source(unstable)(unfixed)
golang-1.19source(unstable)(unfixed)
golang-1.20source(unstable)1.20.12-1
golang-1.21source(unstable)1.21.5-1

Notes

[bookworm] - golang-1.19 <no-dsa> (Minor issue)
[bullseye] - golang-1.15 <no-dsa> (Minor issue)
[buster] - golang-1.11 <postponed> (Limited support, minor issue, follow bullseye DSAs/point-releases)
https://go.dev/issue/64433
https://github.com/golang/go/commit/ec8c526e4be720e94b98ca509e6364f0efaf28f7 (go1.21.5)
https://github.com/golang/go/commit/6446af942e2e2b161c4ec1b60d9703a2b55dc4dd (go1.20.12)

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