ET WEB_SPECIFIC_APPS FXC AE1021 Series Router ntp.general.hostname Authenticated Command Injection Attempt (CVE-2023-49897)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS FXC AE1021 Series Router ntp.general.hostname Authenticated Command Injection Attempt (CVE-2023-49897)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:15;
    content:"/cgi-bin/action";
    http.request_body;
    content:"ntp.general.hostname|3d|"; fast_pattern;
    pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R";
    reference:url,www.akamai.com/blog/security-research/zero-day-vulnerability-spreading-mirai-patched;
    reference:cve,2023-49897;
    classtype:attempted-admin;
    sid:2059881; rev:1;
    metadata:affected_product FXC, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_02_04, cve CVE_2023_49897, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2025_02_04, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)