alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Linksys upload_settings filename Parameter Command Injection Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:28; content:"/cgi-bin/upload_settings.cgi"; fast_pattern; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name|3d 22|filename|22 3b 20|filename|3d 22|"; pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R"; reference:cve,2025-5447; reference:url,github.com/wudipjq/my_vuln/blob/main/Linksys/vuln_12/12.md; classtype:attempted-admin; sid:2062766; rev:1; metadata:affected_product Linksys, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_06_04, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_06_04, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)