Net::SMTP in Ruby before 2.4.0 is vulnerable to SMTP command injection via CRLF sequences in a RCPT TO or MAIL FROM command, as demonstrated by CRLF sequences immediately before and after a DATA substring.
Created ruby tracking bugs for this issue:
Affects: fedora-all [bug 1461848]
Created ruby193-ruby tracking bugs for this issue:
Affects: openshift-1 [bug 1461849]