CVE-2021-21409

Publication date 30 March 2021

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

5.9 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
netty 25.04 plucky
Fixed 4.1.48-4
24.10 oracular
Fixed 4.1.48-4
24.04 LTS noble
Fixed 4.1.48-4
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.10 kinetic
Fixed 1:4.1.48-5ubuntu0.1
22.04 LTS jammy
Fixed 1:4.1.48-4+deb11u1build0.22.04.1
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 1:4.1.45-1ubuntu0.1~esm1
18.04 LTS bionic
Fixed 1:4.1.7-4ubuntu0.1+esm2
16.04 LTS xenial
Fixed 1:4.0.34-1ubuntu0.1~esm1
14.04 LTS trusty
Needs evaluation

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Severity score breakdown

Parameter Value
Base score 5.9 · Medium
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N