The mail gem before 2.5.5 for Ruby (aka A Really Ruby Mail Library) 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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| mail(RubyGems) | 0 | 2.5.5 | N/A |
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