alert http any any -> $HOME_NET any (msg:"ET WEB_SERVER SonicWall SMA Unauthenticated sonicfiles CPU Exhaustion (CVE-2021-20041)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/fileshare/sonicfiles/sonicfiles|3f|"; content:"RacNumber|3d|25"; content:"Arg2|3d 2d|elol"; fast_pattern; reference:url,gist.github.com/jbaines-r7/83202be06be86c5677fb357759a05f34; reference:cve,2021-20041; classtype:web-application-attack; sid:2061559; rev:1; metadata:affected_product SonicWall, attack_target Server, tls_state TLSDecrypt, created_at 2025_04_14, cve CVE_2021_20041, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2025_04_14, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)