ET EXPLOIT TP-Link TL-WR840N/TL-WR841N - Authentication Bypass (Add Port Forwarding)

alert http any any -> $HOME_NET any (
    msg:"ET EXPLOIT TP-Link TL-WR840N/TL-WR841N - Authentication Bypass (Add Port Forwarding)";
    flow:established,to_server;
    http.uri;
    content:"/cgi?3"; endswith;
    http.header;
    content:"/mainFrame.htm";
    http.request_body;
    content:"IP_CONN_PORTTRIGGERING";
    content:"openProtocol";
    content:"openPort=";
    reference:url,exploit-db.com/exploits/44781/;
    classtype:attempted-user;
    sid:2025750; rev:4;
    metadata:affected_product TPLINK, created_at 2018_06_26, deployment Perimeter, deployment Internal, deployment Datacenter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)