Possible request smuggling in HTTP/2 due missing validation of content-length
Impact
The content-length header is not correctly validated if the request only use a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1
This is a followup of https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj which did miss to fix this one case.
Patches
This was fixed as part of 4.1.61.Final
Workarounds
Validation can be done by the user before proxy the request by validating the header.
Betroffene Software
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| Plattform | Paket | Anfällige Versionen | Behoben in |
|---|---|---|---|
| Java / Kotlin (Maven) | io.netty:netty | alle Versionen | keine Korrektur |
| Java / Kotlin (Maven) | io.netty:netty-codec-http2 | >= 4.0.0, < 4.1.61.Final | 4.1.61.Final |
| Java / Kotlin (Maven) | org.jboss.netty:netty | alle Versionen | keine Korrektur |
Verweise
- https://github.com/netty/netty/security/advisories/GHSA-f256-j965-7f32
- https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj
- https://nvd.nist.gov/vuln/detail/CVE-2021-21409
- https://github.com/netty/netty/commit/b0fa4d5aab4215f3c22ce6123dd8dd5f38dc0432
- https://lists.apache.org/thread.html/re39391adcb863f0e9f3f15e7986255948f263f02e4700b82453e7102@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/re1911e05c08f3ec2bab85744d788773519a0afb27272a31ac2a0b4e8@%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rdd5715f3ee5e3216d5e0083a07994f67da6dbb9731ce9e7a6389b18e@%3Ccommits.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rdd206d9dd7eb894cc089b37fe6edde2932de88d63a6d8368b44f5101@%3Ccommits.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rd8f72411fb75b98d366400ae789966373b5c3eb3f511e717caf3e49e@%3Cissues.flink.apache.org%3E
- https://lists.apache.org/thread.html/rd4a6b7dec38ea6cd28b6f94bd4b312629a52b80be3786d5fb0e474bc@%3Cissues.kudu.apache.org%3E
- https://lists.apache.org/thread.html/rcae42fba06979934208bbd515584b241d3ad01d1bb8b063512644362@%3Cdev.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rca0978b634a0c3ebee4126ec29c7f570b165fae3f8f3658754c1cbd3@%3Cissues.kudu.apache.org%3E
- https://lists.apache.org/thread.html/rbde2f13daf4911504f0eaea43eee4f42555241b5f6d9d71564b6c5fa@%3Cjira.kafka.apache.org%3E
- https://lists.apache.org/thread.html/rba2a9ef1d0af882ab58fadb336a58818495245dda43d32a7d7837187@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rafc77f9f03031297394f3d372ccea751b23576f8a2ae9b6b053894c5@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rac8cf45a1bab9ead5c9a860cbadd6faaeb7792203617b6ec3874736d@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/raa413040db6d2197593cc03edecfd168732e697119e6447b0a25d525@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/ra66e93703e3f4bd31bdfd0b6fb0c32ae96b528259bb1aa2b6d38e401@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/re4b0141939370304d676fe23774d0c6fbc584b648919825402d0cb39@%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/re7c69756a102bebce8b8681882844a53e2f23975a189363e68ad0324@%3Cissues.flink.apache.org%3E
- https://lists.apache.org/thread.html/re9e6ed60941da831675de2f8f733c026757fb4fa28a7b6c9f3dfb575@%3Cdev.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/redef0fb5474fd686781007de9ddb852b24f1b04131a248d9a4789183@%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf148b2bf6c2754153a8629bc7495e216bd0bd4c915695486542a10b4@%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf38e4dcdefc7c59f7ba0799a399d6d6e37b555d406a1dfc2fcbf0b35@%3Ccommits.pulsar.apache.org%3E
- https://lists.apache.org/thread.html/rf521ff2be2e2dd38984174d3451e6ee935c845948845c8fccd86371d@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf934292a4a1c189827f625d567838d2c1001e4739b158638d844105b@%3Cissues.kudu.apache.org%3E
- https://security.netapp.com/advisory/ntap-20210604-0003
- https://www.debian.org/security/2021/dsa-4885
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21295
- https://github.com/netty/netty
- https://lists.apache.org/thread.html/r0b09f3e31e004fe583f677f7afa46bd30110904576c13c5ac818ac2c@%3Cissues.flink.apache.org%3E
- https://lists.apache.org/thread.html/r0ca82fec33334e571fe5b388272260778883e307e15415d7b1443de2@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r101f82d8f3b5af0bf79aecbd5b2dd3b404f6bb51d1a54c2c3d29bed9@%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r1b3cb056364794f919aaf26ceaf7423de64e7fdd05a914066e7d5219@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r2732aa3884cacfecac4c54cfaa77c279ba815cad44b464a567216f83@%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r31044fb995e894749cb821c6fe56f487c16a97028e6e360e59f09d58@%3Cissues.zookeeper.apache.org%3E
- CVSS-Vektor
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N- Schwäche (CWE)
CWE-444- Plattform
- Java / Kotlin (Maven)
- Paket
io.netty:netty, io.netty:netty-codec-http2, org.jboss.netty:netty- Veröffentlicht
- 30.03.2021
- Aktualisiert
- 11.10.2026 13:19
Quellen und Lizenzen
OSV / GitHub Advisory Database - GHSA-f256-j965-7f32 - CC BY 4.0
Schwachstellenhistorie: io.netty:netty-codec-http2
Alle veröffentlichten Schwachstellen dieses Pakets (Java / Kotlin (Maven)), neueste zuerst. Zeigt, ob es ein einmaliger Ausrutscher ist oder ein Paket, das man im Auge behalten muss.
- Einträge insgesamt
- 11
- Erste → letzte
- 03.2021 07.2026
- Ohne Fix
- 0
- In Angriffen ausgenutzt
- 0
Verteilung nach Schweregrad
- Hoch 5
- Mittel 6
Veröffentlichungen pro Jahr
- 2021: 2
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 1
- 2026: 7
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