CVE-2023-39326: Denial of service via chunk extensions in net/http
First published: Wed Dec 06 2023(Updated: )
A 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.
Credit: security@golang.org security@golang.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Golang Go | <1.20.12 | |
| Golang Go | >=1.21.0-0<1.21.5 | |
| ubuntu/golang-1.20 | <1.20.3-1ubuntu0.1~20.04.1 | 1.20.3-1ubuntu0.1~20.04.1 |
| ubuntu/golang-1.20 | <1.20.3-1ubuntu0.1~22.04.1 | 1.20.3-1ubuntu0.1~22.04.1 |
| ubuntu/golang-1.20 | <1.20.3-1ubuntu0.2 | 1.20.3-1ubuntu0.2 |
| ubuntu/golang-1.20 | <1.20.8-1ubuntu0.23.10.1 | 1.20.8-1ubuntu0.23.10.1 |
| ubuntu/golang-1.20 | <1.20.12-1 | 1.20.12-1 |
| ubuntu/golang-1.21 | <1.21.1-1~ubuntu20.04.2 | 1.21.1-1~ubuntu20.04.2 |
| ubuntu/golang-1.21 | <1.21.1-1~ubuntu22.04.2 | 1.21.1-1~ubuntu22.04.2 |
| ubuntu/golang-1.21 | <1.21.1-1~ubuntu23.04.2 | 1.21.1-1~ubuntu23.04.2 |
| ubuntu/golang-1.21 | <1.21.1-1ubuntu0.23.10.1 | 1.21.1-1ubuntu0.23.10.1 |
| ubuntu/golang-1.21 | <1.21.5-1 | 1.21.5-1 |
| redhat/golang | <1.20.12 | 1.20.12 |
| redhat/golang 1.21.0 | <0 | 0 |
| redhat/golang | <1.21.5 | 1.21.5 |
| debian/golang-1.11 | <=1.11.6-1+deb10u4<=1.11.6-1+deb10u7 | |
| debian/golang-1.15 | <=1.15.15-1~deb11u4 | |
| debian/golang-1.19 | <=1.19.8-2 | |
| debian/golang-1.21 | 1.21.10-1 |
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Reference Links
- https://go.dev/issue/64433
- https://go.dev/cl/547335
- https://groups.google.com/g/golang-dev/c/6ypN5EjibjM/m/KmLVYH_uAgAJ
- https://pkg.go.dev/vuln/GO-2023-2382
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UIU6HOGV6RRIKWM57LOXQA75BGZSIH6G/
- https://launchpad.net/bugs/cve/CVE-2023-39326
- https://github.com/golang/go/commit/ec8c526e4be720e94b98ca509e6364f0efaf28f7
- https://github.com/golang/go/commit/6446af942e2e2b161c4ec1b60d9703a2b55dc4dd
- https://security-tracker.debian.org/tracker/CVE-2023-39326
- https://github.com/golang/go/commit/ec8c526e4be720e94b98ca509e6364f0efaf28f7 (go1.21.5)
- https://github.com/golang/go/commit/6446af942e2e2b161c4ec1b60d9703a2b55dc4dd (go1.20.12)
- https://ubuntu.com/security/notices/USN-6574-1
- https://www.cve.org/CVERecord?id=CVE-2023-39326
- https://nvd.nist.gov/vuln/detail/CVE-2023-39326
- https://ubuntu.com/security/CVE-2023-39326
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2253332
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2253333
- https://access.redhat.com/errata/RHSA-2024:0530
- https://access.redhat.com/errata/RHSA-2024:0694
- https://access.redhat.com/errata/RHSA-2024:0695
- https://access.redhat.com/errata/RHSA-2024:0728
- https://access.redhat.com/errata/RHSA-2024:0748
- https://access.redhat.com/errata/RHSA-2024:0843
- https://access.redhat.com/errata/RHSA-2024:0880
- https://access.redhat.com/errata/RHSA-2024:0887
- https://access.redhat.com/errata/RHSA-2023:7198
- https://access.redhat.com/errata/RHSA-2023:7201
- https://access.redhat.com/errata/RHSA-2023:7200
- https://access.redhat.com/errata/RHSA-2024:0269
- https://access.redhat.com/errata/RHSA-2024:1041
- https://access.redhat.com/errata/RHSA-2024:1078
- https://access.redhat.com/errata/RHSA-2024:1131
- https://access.redhat.com/errata/RHSA-2024:1149
- https://access.redhat.com/errata/RHSA-2024:0281
- https://access.redhat.com/errata/RHSA-2024:1244
- https://access.redhat.com/errata/RHSA-2024:1434
- https://access.redhat.com/errata/RHSA-2024:1640
- https://access.redhat.com/errata/RHSA-2024:1812
- https://access.redhat.com/errata/RHSA-2024:1859
- https://access.redhat.com/errata/RHSA-2024:1901
- https://access.redhat.com/errata/RHSA-2024:1896
- https://access.redhat.com/errata/RHSA-2024:2160
- https://access.redhat.com/errata/RHSA-2024:2193
- https://access.redhat.com/errata/RHSA-2024:2245
- https://access.redhat.com/errata/RHSA-2024:2272
- https://bugzilla.redhat.com/show_bug.cgi?id=2253330
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