alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT vBulletin 5.x Unauthenticated Remote Code Execution (CVE-2019-16759) M3"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?routestring"; fast_pattern; content:"ajax"; within:7; content:"render"; within:9; content:"widget_php"; within:13; content:"&widgetConfig"; nocase; content:"code"; within:7; content:"echo"; distance:0; nocase; content:"shell_exec"; nocase; within:13; reference:url,seclists.org/fulldisclosure/2019/Sep/31; reference:url,unit42.paloaltonetworks.com/exploits-in-the-wild-for-vbulletin-pre-auth-rce-vulnerability-cve-2019-16759/; classtype:attempted-admin; sid:2028826; rev:3; metadata:affected_product Web_Server_Applications, attack_target Server, created_at 2019_10_14, cve CVE_2019_16759, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2020_08_19, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)