alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
msg:"ET EXPLOIT Nagios XI OS Command Injection (CVE-2021-25297 & CVE-2021-25298)";
flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"nagiosxi/config/monitoringwizard.php?"; fast_pattern;
content:"ip_address=";
content:"|3b|"; within:30;
reference:cve,2021-25296;
reference:cve,2021-25297;
classtype:attempted-admin;
sid:2034993; rev:1;
metadata:attack_target Server, created_at 2022_01_27, cve CVE_2021_25296_CVE_2021_25297, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2022_01_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
)