alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"ET WEB_SERVER Poison Null Byte"; flow:established,to_server; content:"|00|"; http_uri; depth:2400; reference:cve,2006-4542; reference:cve,2006-4458; reference:cve,2006-3602; reference:url,www.security-assessment.com/Whitepapers/0x00_vs_ASP_File_Uploads.pdf; classtype:web-application-activity; sid:2003099; rev:8; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_22;)