[USN-2655-1] Tomcat vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-2655-1
June 25, 2015

tomcat6 vulnerabilities
==========================================================================

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

- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in Tomcat.

Software Description:
- tomcat6: Servlet and JSP engine

Details:

It was discovered that Tomcat incorrectly handled data with malformed
chunked transfer coding. A remote attacker could possibly use this issue to
conduct HTTP request smuggling attacks, or cause Tomcat to consume
resources, resulting in a denial of service. (CVE-2014-0227)

It was discovered that Tomcat incorrectly handled HTTP responses occurring
before the entire request body was finished being read. A remote attacker
could possibly use this issue to cause memory consumption, resulting in a
denial of service. (CVE-2014-0230)

It was discovered that the Tomcat Expression Language (EL) implementation
incorrectly handled accessible interfaces implemented by inaccessible
classes. An attacker could possibly use this issue to bypass a
SecurityManager protection mechanism. (CVE-2014-7810)

Update instructions:

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

Ubuntu 12.04 LTS:
libtomcat6-java 6.0.35-1ubuntu3.6

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

References:
http://www.ubuntu.com/usn/usn-2655-1
CVE-2014-0227, CVE-2014-0230, CVE-2014-7810

Package Information:
https://launchpad.net/ubuntu/+source/tomcat6/6.0.35-1ubuntu3.6