ET WEB_SERVER Apache Tomcat Boundary Overflow DOS/File Upload Attempt

alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (
    msg:"ET WEB_SERVER Apache Tomcat Boundary Overflow DOS/File Upload Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    content:"Content-Type|3a|"; nocase;
    pcre:"/^[^\r\n]*?boundary\s*?=\s*?[^\r\n]/Ri";
    isdataat:4091,relative;
    content:!"|0A|"; within:4091;
    http.header;
    content:"multipart/form-data"; fast_pattern;
    reference:url,blog.spiderlabs.com/2014/02/cve-2014-0050-exploit-with-boundaries-loops-without-boundaries.html;
    reference:cve,2014-0050;
    classtype:web-application-attack;
    sid:2018113; rev:4;
    metadata:created_at 2014_02_12, cve CVE_2014_0050, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_22;
)