alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Possible Gitlab CE/EE Image Parser RCE Inbound (CVE-2021-22205)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/uploads/user"; http.request_body; content:"Content-Type|3a 20|image/jpeg"; content:"DJVMDIRM|00|"; content:"DJVIANT"; content:"|7b|"; content:"|7d|"; within:400; reference:cve,2021-22205; classtype:attempted-admin; sid:2034455; rev:3; metadata:attack_target Server, created_at 2021_11_13, cve CVE_2021_22205, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2024_03_08, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)