alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT IBM Spectrum Protect Plus - Command Injection Attempt Inbound (CVE-2020-4211)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/hostname"; fast_pattern; http.request_body; content:"hostname="; pcre:"/^[^&]*?\x3b/R"; reference:cve,2020-4211; classtype:web-application-attack; sid:2061823; rev:2; metadata:attack_target Server, created_at 2025_04_23, cve CVE_2020_4211, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2026_01_05, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)