alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"ET WEB_SPECIFIC_APPS Atlassian Crowd Plugin Upload Attempt (CVE-2019-11580)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/admin/uploadplugin.action"; endswith; fast_pattern; http.request_body; content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|file_"; content:"Content-Type|3a 20|application/octet-stream|0d 0a 0d 0a 50 4b 03 04|"; distance:0; reference:url,www.corben.io/atlassian-crowd-rce/; reference:cve,CVE-2019-11580; classtype:attempted-admin; sid:2027712; rev:3; metadata:attack_target Web_Server, created_at 2019_07_16, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2020_09_17;)