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CVE-2021-21409

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Date: March 30, 2021

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.

Language: Java

Severity Score

5.9

Related Resources (62)

Url: https://lists.apache.org/thread.html/redef0fb5474fd686781007de9ddb852b24f1b04131a248d9a4789183@%3Cnotifications.zookeeper.apache.org%3E

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-21409

Url: https://www.debian.org/security/2021/dsa-4885

Url: https://lists.apache.org/thread.html/rcae42fba06979934208bbd515584b241d3ad01d1bb8b063512644362@%3Cdev.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/ra66e93703e3f4bd31bdfd0b6fb0c32ae96b528259bb1aa2b6d38e401@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r6dac9bd799ceac499c7a7e152a9b0dc7f2fe7f89ec5605d129bb047b@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/rdd206d9dd7eb894cc089b37fe6edde2932de88d63a6d8368b44f5101@%3Ccommits.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/ra64d56a8a331ffd7bdcd24a9aaaeeedeacd5d639f5a683389123f898@%3Cdev.flink.apache.org%3E

Url: https://lists.apache.org/thread.html/r4a98827bb4a7edbd69ef862f2351391845697c40711820d10df52ca5@%3Ccommits.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/rf934292a4a1c189827f625d567838d2c1001e4739b158638d844105b@%3Cissues.kudu.apache.org%3E

Url: https://lists.apache.org/thread.html/r7879ddcb990c835c6b246654770d836f9d031dee982be836744e50ed@%3Ccommits.pulsar.apache.org%3E

Url: https://lists.apache.org/thread.html/rba2a9ef1d0af882ab58fadb336a58818495245dda43d32a7d7837187@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r0b09f3e31e004fe583f677f7afa46bd30110904576c13c5ac818ac2c@%3Cissues.flink.apache.org%3E

Url: https://lists.apache.org/thread.html/r9fe840c36b74f92b8d4a089ada1f9fd1d6293742efa18b10e06b66d2@%3Ccommits.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/rd4a6b7dec38ea6cd28b6f94bd4b312629a52b80be3786d5fb0e474bc@%3Cissues.kudu.apache.org%3E

Url: https://lists.apache.org/thread.html/r9ec78dc409f3f1edff88f21cab53737f36aad46f582a9825389092e0@%3Cissues.zookeeper.apache.org%3E

Url: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21295

Url: https://www.oracle.com/security-alerts/cpuoct2021.html

Url: https://lists.apache.org/thread.html/re1911e05c08f3ec2bab85744d788773519a0afb27272a31ac2a0b4e8@%3Cnotifications.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r5f2f120b2b8d099226473db1832ffb4d7c1d6dc2d228a164bf293a8e@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r69efd8ef003f612c43e4154e788ca3b1f837feaacd16d97854402355@%3Ccommits.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r2732aa3884cacfecac4c54cfaa77c279ba815cad44b464a567216f83@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r584cf871f188c406d8bd447ff4e2fd9817fca862436c064d0951a071@%3Ccommits.pulsar.apache.org%3E

Url: https://lists.apache.org/thread.html/rdd5715f3ee5e3216d5e0083a07994f67da6dbb9731ce9e7a6389b18e@%3Ccommits.zookeeper.apache.org%3E

Url: https://github.com/netty/netty/security/advisories/GHSA-f256-j965-7f32

Url: https://lists.apache.org/thread.html/r5cbea8614812289a9b98d0cfc54b47f54cef424ac98d5e315b791795@%3Cnotifications.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r0ca82fec33334e571fe5b388272260778883e307e15415d7b1443de2@%3Cissues.zookeeper.apache.org%3E

Url: https://security.netapp.com/advisory/ntap-20210604-0003/

Url: https://lists.apache.org/thread.html/rf521ff2be2e2dd38984174d3451e6ee935c845948845c8fccd86371d@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r70c3a7bfa904f06a1902f4df20ee26e4f09a46b8fd3eb304dc57a2de@%3Cdev.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r31044fb995e894749cb821c6fe56f487c16a97028e6e360e59f09d58@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/re39391adcb863f0e9f3f15e7986255948f263f02e4700b82453e7102@%3Cissues.zookeeper.apache.org%3E

Url: https://github.com/netty/netty/commit/b0fa4d5aab4215f3c22ce6123dd8dd5f38dc0432

Url: https://lists.apache.org/thread.html/r855b4b6814ac829ce2d48dd9d8138d07f33387e710de798ee92c011e@%3Cissues.flink.apache.org%3E

Url: https://lists.apache.org/thread.html/rac8cf45a1bab9ead5c9a860cbadd6faaeb7792203617b6ec3874736d@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r7b54563abebe3dbbe421e1ba075c2030d8d460372f8c79b7789684b6@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/rca0978b634a0c3ebee4126ec29c7f570b165fae3f8f3658754c1cbd3@%3Cissues.kudu.apache.org%3E

Url: https://lists.apache.org/thread.html/r4ea2f1a9d79d4fc1896e085f31fb60a21b1770d0a26a5250f849372d@%3Cissues.kudu.apache.org%3E

Url: https://lists.apache.org/thread.html/r967002f0939e69bdec58f070735a19dd57c1f2b8f817949ca17cddae@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r101f82d8f3b5af0bf79aecbd5b2dd3b404f6bb51d1a54c2c3d29bed9@%3Cnotifications.zookeeper.apache.org%3E

Url: https://www.oracle.com/security-alerts/cpujan2022.html

Url: https://security-tracker.debian.org/tracker/CVE-2021-21409

Url: https://lists.apache.org/thread.html/re4b0141939370304d676fe23774d0c6fbc584b648919825402d0cb39@%3Cnotifications.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r5baac01f9e06c40ff7aab209d5751b3b58802c63734e33324b70a06a@%3Cissues.flink.apache.org%3E

Url: https://lists.apache.org/thread.html/rbde2f13daf4911504f0eaea43eee4f42555241b5f6d9d71564b6c5fa@%3Cjira.kafka.apache.org%3E

Url: https://www.oracle.com/security-alerts/cpuapr2022.html

Url: https://lists.apache.org/thread.html/raa413040db6d2197593cc03edecfd168732e697119e6447b0a25d525@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r4b8be87acf5b9c098a2ee350b5ca5716fe7afeaf0a21a4ee45a90687@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/re9e6ed60941da831675de2f8f733c026757fb4fa28a7b6c9f3dfb575@%3Cdev.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/rd8f72411fb75b98d366400ae789966373b5c3eb3f511e717caf3e49e@%3Cissues.flink.apache.org%3E

Url: https://lists.apache.org/thread.html/re7c69756a102bebce8b8681882844a53e2f23975a189363e68ad0324@%3Cissues.flink.apache.org%3E

Url: https://lists.apache.org/thread.html/rf148b2bf6c2754153a8629bc7495e216bd0bd4c915695486542a10b4@%3Cnotifications.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/r61564d86a75403b854cdafee67fc69c8b88c5f6802c2c838f4282cc8@%3Ccommits.pulsar.apache.org%3E

Url: https://lists.apache.org/thread.html/r1b3cb056364794f919aaf26ceaf7423de64e7fdd05a914066e7d5219@%3Cissues.zookeeper.apache.org%3E

Url: https://github.com/netty/netty/security/advisories/GHSA-wm47-8v5p-wjpj

Url: https://lists.apache.org/thread.html/rafc77f9f03031297394f3d372ccea751b23576f8a2ae9b6b053894c5@%3Cissues.zookeeper.apache.org%3E

Url: https://lists.apache.org/thread.html/rf38e4dcdefc7c59f7ba0799a399d6d6e37b555d406a1dfc2fcbf0b35@%3Ccommits.pulsar.apache.org%3E

Url: https://lists.apache.org/thread.html/r602e98daacc98934f097f07f2eed6eb07c18bfc1949c8489dc7bfcf5@%3Cissues.flink.apache.org%3E

Url: https://www.oracle.com//security-alerts/cpujul2021.html

Url: https://lists.apache.org/thread.html/ra655e5cec74d1ddf62adacb71d398abd96f3ea2c588f6bbf048348eb@%3Cissues.kudu.apache.org%3E

Url: https://lists.apache.org/thread.html/r823d4b27fcba8dad5fe945bdefce3ca5a0031187966eb6ef3cc22ba9@%3Cissues.zookeeper.apache.org%3E

Url: https://www.mend.io/vulnerability-database/CVE-2021-21409

Severity Score

5.9

Weakness Type (CWE)

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

CWE-444

Top Fix

Upgrade Version

Upgrade to version io.netty:netty-codec-http2:4.1.61.Final

CVSS v3.1

Base Score:	5.9
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	HIGH
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	HIGH
Availability (A):	NONE

CVSS v2

Base Score:	4.3
Access Vector (AV):	NETWORK
Access Complexity (AC):	MEDIUM
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	PARTIAL
Availability (A):	NONE
Additional information:

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