ET WEB_SPECIFIC_APPS Linksys check_port_conflict single_port_rule Parameter Buffer Overflow Attempt

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Linksys check_port_conflict single_port_rule Parameter Buffer Overflow Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:27;
    content:"/goform/check_port_conflict"; fast_pattern;
    http.request_body;
    content:"single_port_rule|3d|";
    pcre:"/^[^\x26$]{100,}(?:\x26|$)/R";
    reference:url,github.com/wudipjq/my_vuln/blob/main/Linksys/vuln_15/15.md;
    classtype:web-application-attack;
    sid:2062748; 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;
)