ET WEB_SPECIFIC_APPS SonicOS SSLVPN Authentication Bypass (CVE-2024-53704)

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS SonicOS SSLVPN Authentication Bypass (CVE-2024-53704)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/__api__/v1/client/sessionstatus|3f|"; fast_pattern;
    content:"cookie|3d|";
    threshold:type threshold, track by_src, count 30, seconds 10;
    reference:url,attackerkb.com/topics/UB3P3xHVAo/cve-2024-53704/rapid7-analysis;
    reference:cve,2024-53704;
    classtype:web-application-attack;
    sid:2059786; rev:1;
    metadata:affected_product SonicWall, attack_target Networking_Equipment, tls_state TLSDecrypt, created_at 2025_01_30, cve CVE_2024_53704, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, updated_at 2025_01_30;
    target:dest_ip;
)