alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Cisco Prime Infrastruture RCE - CVE-2019-1821"; http.method; content:"POST"; http.uri; content:"/servlet/UploadServlet"; depth:22; endswith; fast_pattern; http.header; content:"Destination-Dir|3a 20|tftpRoot"; http.request_body; content:"String(|22|/bin/"; content:"new Socket(|22|"; distance:0; content:"Runtime.getRuntime().exec("; distance:0; http.content_type; content:"multipart/form-data|3b|"; startswith; http.header_names; content:!"Referer"; reference:url,tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-pi-rce; classtype:web-application-attack; sid:2027368; rev:4; metadata:attack_target Server, created_at 2019_05_20, cve CVE_2019_1821, deployment Perimeter, deployment Datacenter, performance_impact Low, signature_severity Major, updated_at 2020_09_17;)