ET WEB_SPECIFIC_APPS Zyxel DSL CPE Authenticated HTTP Command Injection (CVE-2024-40890)

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Zyxel DSL CPE Authenticated HTTP Command Injection (CVE-2024-40890)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/pages/tabFW/disagnostic-general.cgi"; fast_pattern;
    http.request_body;
    content:"diagAddr|3d|";
    pcre:"/^(?:\d+\x2e){3}\d+[\x0d\x0a]+[\w\x2f]+\x2b/R";
    reference:url,vulncheck.com/blog/zyxel-http-vuln#cve-2024-40890-authenticated-http-vulnerability;
    reference:cve,2024-40890;
    classtype:web-application-attack;
    sid:2060109; rev:1;
    metadata:affected_product Zyxel, attack_target Networking_Equipment, created_at 2025_02_14, cve CVE_2024_40890, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag CISA_KEV, updated_at 2025_02_14;
    target:dest_ip;
)