alert tcp any any -> $HTTP_SERVERS $HTTP_PORTS (msg:"ET WEB_SERVER Possible CVE-2014-6271 Attempt"; flow:established,to_server; content:" HTTP/1."; pcre:"/^[^\r\n]*?HTTP\/1(?:(?!\r?\n\r?\n)[\x20-\x7e\s]){1,500}\n[\x20-\x7e]{1,100}\x3a[\x20-\x7e]{0,500}\x28\x29\x20\x7b/s"; content:"|28 29 20 7b|"; fast_pattern; reference:url,blogs.akamai.com/2014/09/environment-bashing.html; classtype:attempted-admin; sid:2022028; rev:2; metadata:created_at 2015_11_04, cve CVE_2014_6271, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2019_10_08;)