**Issue Overview:**
A privilege escalation flaw was found in Tomcat when the JMX Remote Lifecycle Listener was enabled. A local attacker without access to the Tomcat process or configuration files could be able to manipulate the RMI registry to perform a man-in-the-middle attack. The attacker could then capture user names and passwords used to access the JMX interface and gain complete control over the Tomcat instance. (CVE-2019-12418)
When using FORM authentication with Apache Tomcat 9.0.0.M1 to 9.0.29, 8.5.0 to 8.5.49 and 7.0.0 to 7.0.98 there was a narrow window where an attacker could perform a session fixation attack. The window was considered too narrow for an exploit to be practical but, erring on the side of caution, this issue has been treated as a security vulnerability. (CVE-2019-17563)
A flaw was found in Apache Tomcat, where the payload length in a WebSocket frame was not correctly validated. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2020-13935)
**Affected Packages:**
tomcat
**Issue Correction:**
Run _yum update tomcat_ to update your system.
**New Packages:**
noarch:
   tomcat-7.0.76-10.amzn2.0.4.noarch
   tomcat-admin-webapps-7.0.76-10.amzn2.0.4.noarch
   tomcat-docs-webapp-7.0.76-10.amzn2.0.4.noarch
   tomcat-javadoc-7.0.76-10.amzn2.0.4.noarch
   tomcat-jsvc-7.0.76-10.amzn2.0.4.noarch
   tomcat-jsp-2.2-api-7.0.76-10.amzn2.0.4.noarch
   tomcat-lib-7.0.76-10.amzn2.0.4.noarch
   tomcat-servlet-3.0-api-7.0.76-10.amzn2.0.4.noarch
   tomcat-el-2.2-api-7.0.76-10.amzn2.0.4.noarch
   tomcat-webapps-7.0.76-10.amzn2.0.4.noarch
src:
   tomcat-7.0.76-10.amzn2.0.4.src
### Additional References
Red Hat: [CVE-2019-12418](), [CVE-2019-17563](), [CVE-2020-13935]()
Mitre: [CVE-2019-12418](), [CVE-2019-17563](), [CVE-2020-13935]()Read More