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CVE-2016-8745

Published: 13 January 2017

A bug in the error handling of the send file code for the NIO HTTP connector in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39, 7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, not not limited to, session ID and the response body. The bug was first noticed in 8.5.x onwards where it appears the refactoring of the Connector code for 8.5.x onwards made it more likely that the bug was observed. Initially it was thought that the 8.5.x refactoring introduced the bug but further investigation has shown that the bug is present in all currently supported Tomcat versions.

Priority

Medium

CVSS 3 base score: 7.5

Status

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

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise
Released (6.0.35-1ubuntu3.9)
trusty Needed

upstream
Released (6.0.49)
xenial Ignored
(end of standard support, was needed)
yakkety Does not exist

zesty Does not exist

Patches:
upstream: http://svn.apache.org/viewvc?view=revision&revision=1777472


tomcat7
Launchpad, Ubuntu, Debian
artful Ignored
(reached end-of-life)
bionic Not vulnerable

cosmic Not vulnerable

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise Does not exist
(precise was needed)
trusty
Released (7.0.52-1ubuntu0.8)
upstream
Released (7.0.74)
xenial
Released (7.0.68-1ubuntu0.3)
yakkety Ignored
(reached end-of-life)
zesty Ignored
(reached end-of-life)
Patches:

upstream: http://svn.apache.org/viewvc?view=revision&revision=1777471

tomcat8
Launchpad, Ubuntu, Debian
artful
Released (8.0.38-2ubuntu1)
bionic
Released (8.0.38-2ubuntu1)
cosmic
Released (8.0.38-2ubuntu1)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (8.0.40)
xenial
Released (8.0.32-1ubuntu1.3)
yakkety
Released (8.0.37-1ubuntu0.1)
zesty
Released (8.0.38-2ubuntu1)
Patches:


upstream: http://svn.apache.org/viewvc?view=revision&revision=1777469