Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses 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 GHSA-wm47-8v5p-wjpj/CVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21295
https://github.com/netty/netty/security/advisories/GHSA-f256-j965-7f32
https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj
https://github.com/netty/netty/commit/b0fa4d5aab4215f3c22ce6123dd8dd5f38dc0432
https://www.debian.org/security/2021/dsa-4885
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
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https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
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https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cnotifications.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Ccommits.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Ccommits.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Ccommits.zookeeper.apache.org%3E
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https://lists.apache.org/thread.html/[email protected]%3Ccommits.zookeeper.apache.org%3E
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https://lists.apache.org/thread.html/[email protected]%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Ccommits.pulsar.apache.org%3E
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https://lists.apache.org/thread.html/[email protected]%3Cdev.flink.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.flink.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.flink.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.flink.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cjira.kafka.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.flink.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cdev.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cnotifications.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cnotifications.zookeeper.apache.org%3E
https://security.netapp.com/advisory/ntap-20210604-0003/
https://lists.apache.org/thread.html/[email protected]%3Cissues.flink.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.flink.apache.org%3E
https://www.oracle.com//security-alerts/cpujul2021.html
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cnotifications.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.kudu.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.kudu.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.kudu.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.kudu.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.kudu.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cdev.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/[email protected]%3Ccommits.zookeeper.apache.org%3E
https://www.oracle.com/security-alerts/cpuoct2021.html
https://lists.apache.org/thread.html/[email protected]%3Ccommits.pulsar.apache.org%3E
Source: MITRE
Published: 2021-03-30
Updated: 2022-05-12
Type: CWE-444
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 5.9
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 2.2
Severity: MEDIUM