fail2ban
Pass
Audited by Gen Agent Trust Hub on Sep 19, 2026
Risk Level: SAFECOMMAND_EXECUTIONINDIRECT_PROMPT_INJECTION
Full Analysis
- [COMMAND_EXECUTION]: The skill requires the agent to execute system-level commands such as
apt-get installandsystemctl restart, and to write configuration files to protected system directories like/etc/fail2ban/. These are standard operations for the intended purpose of configuring security software on a host. - [INDIRECT_PROMPT_INJECTION]: The skill configures Fail2ban to ingest and process untrusted data from Nginx access logs (
/var/log/nginx/access.log). - Ingestion points: Fail2ban reads
/var/log/nginx/access.logto identify IP addresses for banning based on failed authentication or rate limiting. - Boundary markers: The configuration uses standard Fail2ban regex filters to delimit and identify relevant log entries, utilizing the
<HOST>token for IP extraction. - Capability inventory: The skill enables the agent to install packages, modify system-level configuration, and restart system services, which can affect the server's firewall (iptables/nftables).
- Sanitization: Sanitization is handled by the Fail2ban software's internal parsing logic for the
<HOST>token, which is designed to securely extract IP addresses from log strings.
Audit Metadata