2.6.x SMTP security: prevent command injection via To/From addresses #1098
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Validate addresses passed as SMTP command arguments to prevent injection of other SMTP commands. Disallow line breaks and very long addresses which may cause overflows on some old SMTP servers. Ruby 2.4 Net::SMTP already disallows addresses that contain newlines. Enforce this validation in Mail to cover older Ruby versions and other SMTP implementations that don't validate input. SMTP injection whitepaper: http://www.mbsd.jp/Whitepaper/smtpi.pdf Ruby security report: https://hackerone.com/reports/137631 OSVDB entry: https://rubysec.com/advisories/mail-OSVDB-131677
jeremy
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Validate addresses passed as SMTP command arguments to prevent injection of other SMTP commands. Disallow line breaks and very long addresses which may cause overflows on some old SMTP servers. Ruby 2.4 Net::SMTP already disallows addresses that contain newlines. Enforce this validation in Mail to cover older Ruby versions and other SMTP implementations that don't validate input. SMTP injection whitepaper: http://www.mbsd.jp/Whitepaper/smtpi.pdf Ruby security report: https://hackerone.com/reports/137631 OSVDB entry: https://rubysec.com/advisories/mail-OSVDB-131677 Closes #1098
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#1097 for Mail 2.6