alert http any any -> $HTTP_SERVERS any (msg:"ET WEB_SERVER Possible CVE-2014-6271 Attempt in URI"; flow:established,to_server; http.uri; content:"|28 29 20 7b|"; fast_pattern; pcre:"/[=?&\x2f]\s*?\x28\x29\x20\x7b/"; reference:url,blogs.akamai.com/2014/09/environment-bashing.html; classtype:attempted-admin; sid:2019231; rev:6; metadata:created_at 2014_09_25, cve CVE_2014_6271, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_25;)