alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT Javadoc API Redirect CVE-2013-1571"; flow:established,to_server; http.method; content:"GET"; nocase; http.referer; content:"?//"; fast_pattern; pcre:"/\/(?:(?:index|toc)\.html?)?\?\/\//i"; reference:cve,2013-1571; classtype:bad-unknown; sid:2017037; rev:6; metadata:created_at 2013_06_20, signature_severity Major, updated_at 2022_07_14;)