USN-2654-1: Tomcat vulnerabilities

25 June 2015

tomcat7 vulnerabilities

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

  • Ubuntu 15.04
  • Ubuntu 14.10
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Tomcat.

Software Description

  • tomcat7 - Servlet and JSP engine

Details

It was discovered that the Tomcat XML parser incorrectly handled XML External Entities (XXE). A remote attacker could possibly use this issue to read arbitrary files. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-0119)

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. This issue only affected Ubuntu 14.04 LTS. (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 a limited denial of service. This issue only affected Ubuntu 14.04 LTS. (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 15.04
libtomcat7-java - 7.0.56-2ubuntu0.1
Ubuntu 14.10
libtomcat7-java - 7.0.55-1ubuntu0.2
Ubuntu 14.04 LTS
libtomcat7-java - 7.0.52-1ubuntu0.3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References