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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
Upstream
Released (6.0.49)
Ubuntu 21.10 (Impish Indri) Does not exist

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Ignored
(end of standard support, was needed)
Ubuntu 14.04 ESM (Trusty Tahr) Needed

Patches:
Upstream: http://svn.apache.org/viewvc?view=revision&revision=1777472
tomcat7
Launchpad, Ubuntu, Debian
Upstream
Released (7.0.74)
Ubuntu 21.10 (Impish Indri) Does not exist

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable

Ubuntu 16.04 ESM (Xenial Xerus)
Released (7.0.68-1ubuntu0.3)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (7.0.52-1ubuntu0.8)
Patches:
Upstream: http://svn.apache.org/viewvc?view=revision&revision=1777471
tomcat8
Launchpad, Ubuntu, Debian
Upstream
Released (8.0.40)
Ubuntu 21.10 (Impish Indri) Does not exist

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (8.0.38-2ubuntu1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (8.0.32-1ubuntu1.3)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

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