alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT DLink DNS 320 Remote Code Execution (CVE-2019-16057)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/cgi-bin/login_mgr.cgi"; fast_pattern; content:"cmd|3d|login"; distance:0; content:"&port="; distance:0; pcre:"/^\d{2,5}+(?!\&|\d)/R"; reference:cve,2019-16057; reference:url,blog.cystack.net/d-link-dns-320-rce/; classtype:attempted-admin; sid:2028603; rev:2; metadata:attack_target Networking_Equipment, created_at 2019_09_18, cve CVE_2019_16057, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2020_09_02, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)