Fix CVE-2017-0899 CVE-2017-0900 CVE-2017-0901 CVE-2017-0902.
    
    Fix ANSI escape sequence vulnerability (rhbz#1487590).
    
    Fix DoS vulnerability in the query command (rhbz#1487588).
    
    Fix a vulnerability in the gem installer that allowed a malicious gem
    to overwrite arbitrary files (rhbz#1487587).
    
    Fix DNS request hijacking vulnerability (rhbz#1487589).