Rule History

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Citrix Netscaler ADC & Gateway Memory Leak CitrixBleed2 (CVE-2025-5777)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/p/u/doAuthentication.do"; fast_pattern; startswith; http.request_body; content:"login"; content:!"|3d|"; within:1; reference:url,labs.watchtowr.com/how-much-more-must-we-bleed-citrix-netscaler-memory-disclosure-citrixbleed-2-cve-2025-5777/; reference:cve,2025-5777; classtype:web-application-attack; sid:2063315; rev:1; metadata:affected_product Citrix, attack_target Server, created_at 2025_07_07, cve CVE_2025_5777, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2025_07_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)