alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS QNAP QTS/QuTS File Upload (CVE-2024-53691)"; flow:established,to_server; flowbits:isset,ET.ZIP.Symlink.Inbound; flowbits:set,ET.QNAP.CVE-2024-53691.Upload; http.method; content:"POST"; http.uri; content:"/cgi-bin/filemanager/utilRequest.cgi?"; fast_pattern; content:"func|3d|chunked_upload"; reference:url,github.com/C411e/CVE-2024-53691; reference:cve,2024-53691; classtype:web-application-attack; sid:2059742; rev:1; metadata:affected_product QNAP, attack_target Server, tls_state TLSDecrypt, created_at 2025_01_29, cve CVE_2024_53691, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2025_01_29, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;)