alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Cisco Small Business Router RV Series Command Injection (CVE-2023-20118) M1"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/cgi-bin/config_mirror.exp|3f|"; fast_pattern; content:"_cert"; distance:0; pcre:"/^[^\s]*?[\x3b\x60\x7c\x24]/R"; reference:url,www.iotsec-zone.com/article/383; reference:cve,2023-20118; classtype:web-application-attack; sid:2060432; rev:1; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2025_02_27, cve CVE_2023_20118, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2025_02_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)