Important: tomcat

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

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

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