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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 Severity Score

7.5

Score breakdown

Status

Package Release Status
tomcat7
Launchpad, Ubuntu, Debian
impish Does not exist

artful Ignored
(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

jammy Does not exist

kinetic Does not exist

lunar Does not exist

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

Patches:

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

tomcat8
Launchpad, Ubuntu, Debian
impish Does not exist

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

jammy Does not exist

kinetic Does not exist

lunar 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)
mantic Does not exist

Patches:


upstream: http://svn.apache.org/viewvc?view=revision&revision=1777469
tomcat6
Launchpad, Ubuntu, Debian
xenial Needed

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

kinetic Does not exist

lunar Does not exist

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

upstream
Released (6.0.49)
yakkety Does not exist

zesty Does not exist

mantic Does not exist

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


Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N