==========================================================================
Ubuntu Security Notice USN-3665-1
May 30, 2018

tomcat7, tomcat8 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Tomcat.

Software Description:
- tomcat8: Servlet and JSP engine
- tomcat7: Servlet and JSP engine

Details:

It was discovered that Tomcat incorrectly handled being configured with
HTTP PUTs enabled. A remote attacker could use this issue to upload a JSP
file to the server and execute arbitrary code. This issue only affected
Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2017-12616,
CVE-2017-12617)

It was discovered that Tomcat contained incorrect documentation regarding
description of the search algorithm used by the CGI Servlet to identify
which script to execute. This issue only affected Ubuntu 17.10.
(CVE-2017-15706)

It was discovered that Tomcat incorrectly handled en empty string URL
pattern in security constraint definitions. A remote attacker could
possibly use this issue to gain access to web application resources,
contrary to expectations. This issue only affected Ubuntu 14.04 LTS,
Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2018-1304)

It was discovered that Tomcat incorrectly handled applying certain security
constraints. A remote attacker could possibly access certain resources,
contrary to expectations. This issue only affected Ubuntu 14.04 LTS,
Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2018-1305)

It was discovered that the Tomcat CORS filter default settings were
insecure and would enable 'supportsCredentials' for all origins, contrary
to expectations. (CVE-2018-8014)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
  libtomcat8-java                 8.5.30-1ubuntu1.2
  tomcat8                         8.5.30-1ubuntu1.2

Ubuntu 17.10:
  libtomcat8-java                 8.5.21-1ubuntu1.1
  tomcat8                         8.5.21-1ubuntu1.1

Ubuntu 16.04 LTS:
  libtomcat8-java                 8.0.32-1ubuntu1.6
  tomcat8                         8.0.32-1ubuntu1.6

Ubuntu 14.04 LTS:
  libtomcat7-java                 7.0.52-1ubuntu0.14
  tomcat7                         7.0.52-1ubuntu0.14

In general, a standard system update will make all the necessary changes.

References:
  https://usn.ubuntu.com/usn/usn-3665-1
  CVE-2017-12616, CVE-2017-12617, CVE-2017-15706, CVE-2018-1304,
  CVE-2018-1305, CVE-2018-8014

Package Information:
  https://launchpad.net/ubuntu/+source/tomcat8/8.5.30-1ubuntu1.2
  https://launchpad.net/ubuntu/+source/tomcat8/8.5.21-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/tomcat8/8.0.32-1ubuntu1.6
  https://launchpad.net/ubuntu/+source/tomcat7/7.0.52-1ubuntu0.14