ET WEB_SPECIFIC_APPS vBulletin RCE Inbound (CVE-2019-16759 Bypass)

alert http $EXTERNAL_NET any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS vBulletin RCE Inbound (CVE-2019-16759 Bypass)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/widget_tabbedcontainer_tab_panel"; fast_pattern;
    http.request_body;
    content:"subWidgets|5b|";
    content:"|3b|"; distance:0;
    reference:url,blog.exploitee.rs/2020/exploiting-vbulletin-a-tale-of-patch-fail/;
    classtype:attempted-admin;
    sid:2030667; rev:1;
    metadata:attack_target Web_Server, created_at 2020_08_10, cve CVE_2019_16759, deployment Perimeter, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_10;
)