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CVE-2021-33037

Published: 12 July 2021

Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.

Priority

Medium

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
tomcat6
Launchpad, Ubuntu, Debian
impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Needs triage

bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

upstream Needs triage

xenial Needs triage

mantic Does not exist

tomcat7
Launchpad, Ubuntu, Debian
impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

bionic Needs triage

focal Does not exist

groovy Does not exist

hirsute Does not exist

trusty Needs triage

upstream Needs triage

xenial Needs triage

mantic Does not exist

tomcat8
Launchpad, Ubuntu, Debian
impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

upstream Needs triage

xenial Needs triage

bionic Needs triage

focal Does not exist

groovy Does not exist

hirsute Does not exist

trusty Does not exist

mantic Does not exist

tomcat9
Launchpad, Ubuntu, Debian
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
jammy Needs triage

lunar Ignored
(end of life, was needs-triage)
trusty Does not exist

upstream Needs triage

xenial Does not exist

bionic
Released (9.0.16-3ubuntu0.18.04.2)
focal
Released (9.0.31-1ubuntu0.2)
kinetic Ignored
(end of life, was needs-triage)
impish Ignored
(end of life)
mantic Needs triage

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N