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[USN-3723-1] Tomcat vulnerabilities

Ubuntu Security Notice USN-3723-1
July 25, 2018

tomcat7, tomcat8 vulnerabilities

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

- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS


Several security issues were fixed in Tomcat.

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


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 LTS:
  libtomcat8-java                 8.0.32-1ubuntu1.7
  tomcat8                         8.0.32-1ubuntu1.7

Ubuntu 14.04 LTS:
  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.

  CVE-2018-1336, CVE-2018-8034

Package Information:

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