ET WEB_SPECIFIC_APPS Zyxel Authentication Bypass Attempt (CVE-2023-4473) - Information Leak via show_sysinfo

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Zyxel Authentication Bypass Attempt (CVE-2023-4473) - Information Leak via show_sysinfo";
    flow:established,to_server;
    http.uri;
    content:"/cmd,/ck6fup6/system_main/show_sysinfo/"; fast_pattern; startswith;
    pcre:"/(?:favicon.ico|adv,\/cgi-bin\/weblogin\.cgi|desktop,\/(?:file_download\.cgi|cgi-bin\/dlnotify|login\.html|res\/|css\/|utility\/flag\/js)|MyWeb\/|register_main\/setCookie|playzone,\/(?:mobile_login\.html|mobile\/sencha\/|mobile\/images\/|images\/))/R";
    reference:url,bugprove.com/knowledge-hub/cve-2023-4473-and-cve-2023-4474-authentication-bypass-and-multiple-blind-os-command-injection-vulnerabilities-in-zyxel-s-nas-326-devices/;
    reference:cve,2023-4473;
    classtype:attempted-admin;
    sid:2052326; rev:2;
    metadata:affected_product Zyxel, created_at 2024_05_01, cve CVE_2023_4473, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_11_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)