ET WEB_SPECIFIC_APPS Telesquare internet.cgi hostname Parameter Command Injection Attempt

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Telesquare internet.cgi hostname Parameter Command Injection Attempt";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/cgi-bin/internet.cgi|3f|"; startswith; fast_pattern;
    content:"hostname|3d|"; distance:0;
    pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R";
    reference:url,github.com/lin-3-start/lin-cve/blob/main/Telesquare%20Tlr-2005Ksh/Telesquare%20Tlr-2005Ksh%E5%AD%98%E5%9C%A8%E5%91%BD%E4%BB%A4%E6%B3%A8%E5%85%A5%E6%BC%8F%E6%B4%9E.md;
    classtype:attempted-admin;
    sid:2064094; rev:1;
    metadata:affected_product Telesquare, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_08_21, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_21, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)