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Published: 27 January 2020

Netty 4.1.43.Final allows HTTP Request Smuggling because it mishandles Transfer-Encoding whitespace (such as a [space]Transfer-Encoding:chunked line) and a later Content-Length header. This issue exists because of an incomplete fix for CVE-2019-16869.

From the Ubuntu Security Team

It was discovered that Netty has HTTP request smuggling vulnerability. A remote attacker could use it to extract sensitive information.



CVSS 3 base score: 7.5


Package Release Status
Launchpad, Ubuntu, Debian
bionic Needs triage

eoan Ignored
(reached end-of-life)
focal Not vulnerable
groovy Not vulnerable
hirsute Not vulnerable
impish Not vulnerable
jammy Not vulnerable
kinetic Not vulnerable
precise Does not exist

Released (1:3.2.6.Final-2+deb8u2build0.14.04.1~esm1)
upstream Needs triage

xenial Needs triage

Launchpad, Ubuntu, Debian
bionic Not vulnerable
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

precise Does not exist

trusty Does not exist

upstream Needs triage

Released (3.9.0.Final-1ubuntu0.1)