alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Citrix Information Disclosure Attempt Inbound (CVE-2020-8195)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/rapi/filedownload?"; fast_pattern; content:"filter=path|3a|"; pcre:"/^(?:\x2f|\x5c|%+(?:25)*(?:2[fF]|5[cC]))/R"; http.request_body; content:"<clipermission"; startswith; reference:url,research.nccgroup.com/2020/07/10/rift-citrix-adc-vulnerabilities-cve-2020-8193-cve-2020-8195-and-cve-2020-8196-intelligence/; reference:cve,2020-8195; classtype:attempted-admin; sid:2031068; rev:2; metadata:affected_product Citrix, attack_target Server, tls_state TLSDecrypt, created_at 2020_10_21, cve CVE_2020_8195, deployment Perimeter, deployment Internal, performance_impact Low, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_10_26, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1082, mitre_technique_name System_Information_Discovery; target:dest_ip;)