USN-3723-1: Tomcat vulnerabilities

Releases

• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• tomcat7 - Servlet and JSP engine
• tomcat8 - Servlet and JSP engine

Details

It was discovered that Tomcat incorrectly handled decoding certain
UTF-8 strings. A remote attacker could possibly use this issue to cause
Tomcat to crash, resulting in a denial of service. (CVE-2018-1336)

It was discovered that the Tomcat WebSocket client incorrectly performed
hostname verification. A remote attacker could possibly use this issue to
intercept sensitive information. (CVE-2018-8034)

Update instructions

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

Ubuntu 16.04

• libtomcat8-java - 8.0.32-1ubuntu1.7
• tomcat8 - 8.0.32-1ubuntu1.7

Ubuntu 14.04

• libtomcat7-java - 7.0.52-1ubuntu0.15
• tomcat7 - 7.0.52-1ubuntu0.15

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

References

• CVE-2018-1336
• CVE-2018-8034

Related notices

• USN-4791-1: libtomcat7-java, tomcat7-docs, tomcat7, tomcat7-admin, libservlet3.0-java-doc, tomcat7-common, tomcat7-user, tomcat7-examples, libservlet3.0-java