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macOS post-exploitation for credential harvesting, DTrace monitoring, TCC bypass, and stealth operations via native tools
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Showing SKILL.md
| name | cis-ubuntu2004-v300-2-1-2 |
| description | Ensure avahi daemon services are not in use |
| category | cis-networking |
| version | 3.0.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-20.04","services"] |
| cis_id | 2.1.2 |
| cis_benchmark | CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Avahi is a free zeroconf implementation, including a system for multicast DNS/DNS-SD service discovery. Avahi allows programs to publish and discover services and hosts running on a local network with no specific configuration.
Automatic discovery of network services is not normally required for system functionality. It is recommended to disable the service to reduce the remote attack surface.
Run the following command to verify avahi-daemon is not installed:
# dpkg-query -W -f='${binary:Package}\t${Status}\t${db:Status-Status}\n' avahi-daemon
If installed, run:
# systemctl is-enabled avahi-daemon.socket avahi-daemon.service
# systemctl is-active avahi-daemon.socket avahi-daemon.service
Verify the services are not enabled and not active.
avahi-daemon should not be installed, or if installed, the services should be stopped and masked.
Run the following commands to stop, mask, and purge avahi-daemon:
# systemctl stop avahi-daemon.socket avahi-daemon.service
# systemctl mask avahi-daemon.socket avahi-daemon.service
# apt purge avahi-daemon
avahi-daemon is installed by default on desktop installations.
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 4.8 Uninstall or Disable Unnecessary Services on Enterprise Assets and Software | x | x | |
| v7 | 9.2 Ensure Only Approved Ports, Protocols and Services Are Running | x | x |
MITRE ATT&CK Mappings: T1203, T1210, T1543, T1543.002 | TA0008 | M1042