| name | cis-tomcat10-v110-10.17 |
| description | Setting Security Lifecycle Listener (Automated) |
| category | cis-tomcat |
| version | 1.1.0 |
| author | cyberstrike-official |
| tags | ["cis","tomcat","linux","java","configuration","hardening","security"] |
| cis_id | 10.17 |
| cis_benchmark | CIS Apache Tomcat 10 Benchmark v1.1.0 |
| tech_stack | ["linux","tomcat","java"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
10.17 Setting Security Lifecycle Listener (Automated)
Description
The Security Lifecycle Listener performs a number of security checks when Tomcat starts and prevents Tomcat from starting if they fail.
Rationale
When enabled, the Security Lifecycle Listener can
- Enforce a blacklist of OS users that must not be used to start Tomcat.
- Set the least restrictive
umask before Tomcat start
Audit Procedure
Review server.xml to ensure the Security Lifecycle Listener element is uncommented with the checkedOsUsers and minimumUmask attributes set with expected values.
Remediation
Uncomment the listener in $CATALINA_BASE/conf/server.xml. If the operating system supports umask then the line in $CATALINA_HOME/bin/catalina.sh that obtains the umask also needs to be uncommented.
Within Server elements add:
-
checkedOsUsers: A comma separated list of OS users that must not be used to start Tomcat. If not specified, the default value of root is used.
-
minimumUmask: The least restrictive umask that must be configured before Tomcat will start. If not specified, the default value of 0007 is used.
<Listener className="org.apache.catalina.security.SecurityListener"
checkedOsUsers="alex,bob" minimumUmask="0007" />
Default Value
The Security Lifecycle Listener is not enabled by default. For checkedOsUsers, the default value is root. For minimumUmask, the default value is 0007.
References
- https://tomcat.apache.org/tomcat-9.0-doc/config/listeners.html#Security_Lifecycle_Listener_-_org.apache.catalina.security.SecurityListener
CIS Controls