Apache HTTPD throw HTTP 500 error with premature end of script headers in logs

Issue

• While accessing the CGI scripts, Apache HTTPD shows HTTP 500 error in web browser. At the same time, HTTPD access_log and error_log shows below messages.

  #access_log
  "GET /cgi-bin/test.pl?user=admin HTTP/1.1" 500"
  
  #error_log
  (8)Exec format error: exec of '/var/www/cgi-bin/test.pl' failed Premature end of script headers: test.pl