alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Ivanti Connect Secure CRLF Injection Remote Code Execution Attempt (CVE-2024-37404)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:36; content:"/dana-admin/cert/admincertnewcsr.cgi"; fast_pattern; http.request_body; pcre:"/(?:organizationName|organizationalUnitName|localityName|stateOrProvinceName|countryName|emailAddress)\x3d[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24)).*?(?:openssl(?:\x5f|%5[fF])conf|engine(?:s|(?:\x5f|%5[fF])id)|dynamic(?:\x5f|%5[fF])path)?/i"; reference:cve,2024-37404; reference:url,blog.amberwolf.com/blog/2024/october/cve-2024-37404-ivanti-connect-secure-authenticated-rce-via-openssl-crlf-injection/; classtype:attempted-admin; sid:2056578; rev:2; metadata:affected_product Ivanti, attack_target Networking_Equipment, tls_state TLSDecrypt, created_at 2024_10_09, cve CVE_2024_37404, deployment Perimeter, deployment Internal, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_05, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)