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CVE-2020-1935

Published: 24 February 2020

In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.

Notes

AuthorNote
mdeslaur
backport to 8.0 available in 8.0.14-1+deb8u17

Priority

Low

Cvss 3 Severity Score

4.8

Score breakdown

Status

Package Release Status
tomcat7
Launchpad, Ubuntu, Debian
bionic Needs triage

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 Needs triage

upstream Needs triage

xenial Needs triage

Patches:
upstream: https://github.com/apache/tomcat/commit/702bf15bea292915684d931526d95d4990b2e73d (7.0.100)


tomcat8
Launchpad, Ubuntu, Debian
bionic Needs triage

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

xenial
Released (8.0.32-1ubuntu1.13)
Patches:

upstream: https://github.com/apache/tomcat/commit/8fbe2e962f0ea138d92361921643fe5abe0c4f56 (8.5.51)

tomcat9
Launchpad, Ubuntu, Debian
bionic Needs triage

eoan Ignored
(reached end-of-life)
focal Not vulnerable
(9.0.31-1)
groovy Not vulnerable
(9.0.31-1)
hirsute Not vulnerable
(9.0.31-1)
impish Not vulnerable
(9.0.31-1)
jammy Not vulnerable
(9.0.31-1)
kinetic Not vulnerable
(9.0.31-1)
precise Does not exist

trusty Does not exist

upstream
Released (9.0.31-1)
xenial Does not exist

Patches:


upstream: https://github.com/apache/tomcat/commit/8bfb0ff7f25fe7555a5eb2f7984f73546c11aa26 (9.0.31)

Severity score breakdown

Parameter Value
Base score 4.8
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N