ET WEB_SPECIFIC_APPS D-Link DIR-605 getcfg.php Authentication Bypass Attempt (CVE-2021-40655)

alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS D-Link DIR-605 getcfg.php Authentication Bypass Attempt (CVE-2021-40655)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:11;
    content:"/getcfg.php";
    http.request_body;
    content:"SERVICES|3d|DEVICE.ACCOUNT"; fast_pattern;
    content:"AUTHORIZED_GROUP|3d|1|25|0a"; nocase;
    reference:url,attackerkb.com/topics/wTT1ZhDWlH/cve-2021-40655/vuln-details;
    reference:url,github.com/Ilovewomen/D-LINK-DIR-605/;
    reference:cve,2021-40655;
    classtype:attempted-admin;
    sid:2059893; rev:1;
    metadata:affected_product D_Link, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_02_05, cve CVE_2021_40655, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2025_02_05, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)