How do I install the Cis Tomcat101 2.3 skill?

Run npx skillmds@latest add cyberstrikeus/cis-tomcat101-2-3 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Cis Tomcat101 2.3 skill do?

Alter the Advertised server.built Date (Manual) It is listed under Coding & Dev Tools on SkillMD.

Is Cis Tomcat101 2.3 safe to use?

SkillMD's automated safety review verdict for this skill is PASS. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Cis Tomcat101 2.3?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Cis Tomcat101 2.3 free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Cis Tomcat101 2.3?

cyberstrikeus (@cyberstrikeus) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Cis Tomcat101 2.3 by cyberstrikeus — Agent Skill

Name: Cis Tomcat101 2.3
Author: cyberstrikeus

File contents

Alter the Advertised server.built Date (Manual)

Description

The server.built date represents the date which Tomcat was compiled and packaged. This value is presented to Tomcat clients when clients connect to the server.

Rationale

Altering the server.built string may make it harder for attackers to fingerprint which vulnerabilities affect the server platform.

Audit Procedure

Perform the following to determine if the server.built value has been changed: Extract the ServerInfo.properties file and examine the server.built attribute.

$ cd $CATALINA_HOME/lib
$ jar xf catalina.jar org/apache/catalina/util/ServerInfo.properties
$ grep server.built org/apache/catalina/util/ServerInfo.properties

Remediation

Perform the following to alter the server version string that gets displayed when clients connect to the server.

Extract the ServerInfo.properties file from the catalina.jar file:

$ cd $CATALINA_HOME/lib
$ jar xf catalina.jar org/apache/catalina/util/ServerInfo.properties

Navigate to the util directory that was created

$ cd org/apache/Catalina/util

Open ServerInfo.properties in an editor
Update the server.built attribute in the ServerInfo.properties file.

server.built=

Update the catalina.jar with the modified ServerInfo.properties file.

$ jar uf catalina.jar org/apache/catalina/util/ServerInfo.properties

Default Value

The default value for the server.built attribute is build date and time. For example, Jul 8 2008 11:40:35.

CIS Controls

v8:

16.7 Use Standard Hardening Configuration Templates for Application Infrastructure
- Use standard, industry-recommended hardening configuration templates for application infrastructure components. This includes underlying servers, databases, and web servers, and applies to cloud containers, Platform as a Service (PaaS) components, and SaaS components. Do not allow in-house developed software to weaken configuration hardening.

v7:

13.2 Remove Sensitive Data or Systems Not Regularly Accessed by Organization
- Remove sensitive data or systems not regularly accessed by the organization from the network. These systems shall only be used as stand alone systems (disconnected from the network) by the business unit needing to occasionally use the system or completely virtualized and powered off until needed.

Profile Applicability

Level 2

---name: cis-tomcat101-2-3description: Alter the Advertised server.built Date (Manual)---# Alter the Advertised server.built Date (Manual)## DescriptionThe `server.built` date represents the date which Tomcat was compiled and packaged. This value is presented to Tomcat clients when clients connect to the server.## RationaleAltering the `server.built` string may make it harder for attackers to fingerprint which vulnerabilities affect the server platform.## Audit ProcedurePerform the following to determine if the `server.built` value has been changed: Extract the ServerInfo.properties file and examine the `server.built` attribute.```bash$ cd $CATALINA_HOME/lib$ jar xf catalina.jar org/apache/catalina/util/ServerInfo.properties$ grep server.built org/apache/catalina/util/ServerInfo.properties```## RemediationPerform the following to alter the server version string that gets displayed when clients connect to the server.1. Extract the ServerInfo.properties file from the catalina.jar file:```bash$ cd $CATALINA_HOME/lib$ jar xf catalina.jar org/apache/catalina/util/ServerInfo.properties```2. Navigate to the util directory that was created```bash$ cd org/apache/Catalina/util```3. Open ServerInfo.properties in an editor4. Update the `server.built` attribute in the ServerInfo.properties file.```server.built=```5. Update the catalina.jar with the modified ServerInfo.properties file.```bash$ jar uf catalina.jar org/apache/catalina/util/ServerInfo.properties```## Default ValueThe default value for the `server.built` attribute is build date and time. For example, Jul 8 2008 11:40:35.## CIS Controls**v8:**- 16.7 Use Standard Hardening Configuration Templates for Application Infrastructure - Use standard, industry-recommended hardening configuration templates for application infrastructure components. This includes underlying servers, databases, and web servers, and applies to cloud containers, Platform as a Service (PaaS) components, and SaaS components. Do not allow in-house developed software to weaken configuration hardening.**v7:**- 13.2 Remove Sensitive Data or Systems Not Regularly Accessed by Organization - Remove sensitive data or systems not regularly accessed by the organization from the network. These systems shall only be used as stand alone systems (disconnected from the network) by the business unit needing to occasionally use the system or completely virtualized and powered off until needed.## Profile Applicability- Level 2

Frequently asked questions

Cis Tomcat101 2.3