==========================================================================
Ubuntu Security Notice USN-3519-1
January 08, 2018

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

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

- Ubuntu 17.04
- 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 certain pipelined
requests when sendfile was used. A remote attacker could use this issue to
obtain wrong responses possibly containing sensitive information.
(CVE-2017-5647)

It was discovered that Tomcat incorrectly used the appropriate facade
object. A malicious application could possibly use this to bypass Security
Manager restrictions. (CVE-2017-5648)

It was discovered that Tomcat incorrectly handled error pages. A remote
attacker could possibly use this issue to replace or remove the custom
error page. (CVE-2017-5664)

It was discovered that Tomcat incorrectly handled the CORS filter. A remote
attacker could possibly use this issue to perform cache poisoning.
(CVE-2017-7674)

Update instructions:

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

Ubuntu 17.04:
  libtomcat8-java                 8.0.38-2ubuntu2.2
  tomcat8                         8.0.38-2ubuntu2.2

Ubuntu 16.04 LTS:
  libtomcat8-java                 8.0.32-1ubuntu1.5
  tomcat8                         8.0.32-1ubuntu1.5

Ubuntu 14.04 LTS:
  libtomcat7-java                 7.0.52-1ubuntu0.13
  tomcat7                         7.0.52-1ubuntu0.13

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

References:
  https://www.ubuntu.com/usn/usn-3519-1
  CVE-2017-5647, CVE-2017-5648, CVE-2017-5664, CVE-2017-7674

Package Information:
  https://launchpad.net/ubuntu/+source/tomcat8/8.0.38-2ubuntu2.2
  https://launchpad.net/ubuntu/+source/tomcat8/8.0.32-1ubuntu1.5
  https://launchpad.net/ubuntu/+source/tomcat7/7.0.52-1ubuntu0.13