Amazon Linux AMI : tomcat6 / tomcat7,tomcat8 (ALAS-2016-764)
High Nessus Plugin ID 94684
SynopsisThe remote Amazon Linux AMI host is missing a security update.
DescriptionIt was discovered that the Tomcat packages installed certain configuration files read by the Tomcat initialization script as writeable to the tomcat group. A member of the group or a malicious web application deployed on Tomcat could use this flaw to escalate their privileges. (CVE-2016-6325)
A malicious web application was able to bypass a configured SecurityManager via a Tomcat utility method that was accessible to web applications. (CVE-2016-5018)
The Realm implementations did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder. (CVE-2016-0762)
When a SecurityManager is configured, a web application's ability to read system properties should be controlled by the SecurityManager.
Tomcat's system property replacement feature for configuration files could be used by a malicious web application to bypass the SecurityManager and read system properties that should not be visible.
A malicious web application was able to bypass a configured SecurityManager via manipulation of the configuration parameters for the JSP Servlet. (CVE-2016-6796)
The ResourceLinkFactory did not limit web application access to global JNDI resources to those resources explicitly linked to the web application. Therefore, it was possible for a web application to access any global JNDI resource whether an explicit ResourceLink had been configured or not. (CVE-2016-6797)
SolutionRun 'yum update tomcat6' to update your system.
Run 'yum update tomcat7' to update your system.
Run 'yum update tomcat8' to update your system.