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USN-4557-1: Tomcat vulnerabilities

30 September 2020

Several security issues were fixed in Tomcat.

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Releases

Packages

Details

It was discovered that the Tomcat realm implementations incorrectly handled
passwords when a username didn't exist. A remote attacker could possibly
use this issue to enumerate usernames. (CVE-2016-0762)

Alvaro Munoz and Alexander Mirosh discovered that Tomcat incorrectly
limited use of a certain utility method. A malicious application could
possibly use this to bypass Security Manager restrictions. (CVE-2016-5018)

It was discovered that Tomcat incorrectly controlled reading system
properties. A malicious application could possibly use this to bypass
Security Manager restrictions. (CVE-2016-6794)

It was discovered that Tomcat incorrectly controlled certain configuration
parameters. A malicious application could possibly use this to bypass
Security Manager restrictions. (CVE-2016-6796)

It was discovered that Tomcat incorrectly limited access to global JNDI
resources. A malicious application could use this to access any global JNDI
resource without an explicit ResourceLink. (CVE-2016-6797)

Regis Leroy discovered that Tomcat incorrectly filtered certain invalid
characters from the HTTP request line. A remote attacker could possibly
use this issue to inject data into HTTP responses. (CVE-2016-6816)

Pierre Ernst discovered that the Tomcat JmxRemoteLifecycleListener did not
implement a recommended fix. A remote attacker could possibly use this
issue to execute arbitrary code. (CVE-2016-8735)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 16.04

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

Related notices

  • USN-3177-1: libservlet3.0-java-doc, libtomcat6-java, tomcat6, tomcat7, libtomcat8-java, tomcat7-common, tomcat8, libservlet3.0-java, libservlet3.1-java, tomcat8-docs, libservlet3.1-java-doc, tomcat7-user, tomcat8-common, libtomcat7-java, tomcat7-docs, tomcat7-examples, tomcat8-admin, tomcat7-admin, tomcat8-examples, tomcat8-user