ET WEB_SPECIFIC_APPS Zyxel AMG1302-T10B Directory Traversal Attempt (CVE-2025-3577)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Zyxel AMG1302-T10B Directory Traversal Attempt (CVE-2025-3577)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/cgi-bin/pages/maintenance/userAccount/userAccount.html"; fast_pattern;
    http.cookie;
    content:"SESSIONID|3d|";
    pcre:"/^[^\x26]*?(?:(?:\x2e|%2[Ee]){1,2}(?:\x2f|\x5c|%5[Cc]|%2[Ff]){1,}){2,}/R";
    reference:cve,2025-3577;
    reference:url,github.com/Jiangxiazhe/IOT_Vulnerability/blob/main/README.md;
    classtype:attempted-admin;
    sid:2061848; rev:1;
    metadata:affected_product Zyxel, tls_state plaintext, created_at 2025_04_24, cve CVE_2025_3577, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_04_24, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)