Cis Bind V100 1 2
DevOps & Securitycis-bind-v100-1-2Cis Bind V100 1 2 is an Agent Skill for devops & security published in the CyberStrikeus/CyberStrike repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.
Do Not Install a Multi-Use System (Manual)
How to use this skill
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- Copy and paste the prompt below.
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Inspect the Agent Skill at https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Server_Software/Bind/CIS_ISC_BIND_DNS_Server_9.11_Benchmark_v1.0.0/cis-bind-v100-1-2/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/cis-bind-v100-1-2, but wait for my approval before writing files or running scripts.
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CIS 1.2 — Do Not Install a Multi-Use System
Profile Applicability
- Authoritative Name Server Level 1
- Caching Only Name Server Level 1
Description
Default server configurations often expose a wide variety of services unnecessarily increasing the risk to the system. Just because a server can perform many services doesn't mean it is wise to do so. The number of services and daemons executing on the ISC BIND DNS server should be limited to those necessary, with the DNS service being the only primary function of the server.
Rationale
Maintaining a server for a single purpose increases the security of your system. The more services which are exposed to an attacker, the more potential vectors an attacker has to exploit the system and therefore the higher the risk for the server. A DNS server should function as only a name server and should not be mixed with other primary functions such as email, web, or database.
Impact
Not specified.
Audit Procedure
Leverage the package or services manager for your OS to list enabled services and review to ensure each service is necessary and has a documented business need. On Red Hat systems, the following commands will produce the list of current services enabled. The systemctl command lists any systemd based services, which are common on current Linux systems while chkconfig will list any older traditional SysV based services.
# systemctl -t service --state enabled list-unit-files
# chkconfig --list | grep ':on'
Remediation
Disable all unnecessary services or move necessary primary services other than DNS to another server. Leverage the package or services manager for your OS to uninstall or disable unneeded services. On Red Hat systems, the following commands may be used to uninstall a package or disable a service:
# yum erase <package name>
# systemctl disable <service name>
Default Value
Depends on the platform
References
None listed.
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v6 | 9.5 Operate Critical Services On Dedicated Hosts (i.e. DNS, Mail, Web, Database) | N | Y | Y |
| v7 | 9 Limitation and Control of Network Ports, Protocols, and Services | Y | Y | Y |
MITRE ATT&CK Mappings
| Tactic | Technique |
|---|---|
| Initial Access | T1190 Exploit Public-Facing Application |
| Lateral Movement | T1210 Exploitation of Remote Services |
Profile
- Level 1 - Authoritative Name Server
- Level 1 - Caching Only Name Server