alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Ivanti Avalanche SmartDeviceServer XML External Entity Injection (CVE-2024-38653)"; flow:established,to_server; http.method; content:"PUT"; http.uri; content:"/mdm/checkin"; fast_pattern; http.request_body; content:"|3c 3f|xml"; startswith; content:"|3c 21|ENTITY|20 25|"; distance:0; reference:url,github.com/pwnfuzz/POCs/tree/main/CVE%202024-38653; reference:cve,2024-38653; classtype:web-application-attack; sid:2059880; rev:1; metadata:affected_product Ivanti, attack_target Server, tls_state TLSDecrypt, created_at 2025_02_04, cve CVE_2024_38653, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Exploit, updated_at 2025_02_04, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)