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[Security] Bump mail from 2.5.4 to 2.5.5 #5

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Bumps mail from 2.5.4 to 2.5.5. This update includes a security fix.

Vulnerabilities fixed

Sourced from The Ruby Advisory Database.

SMTP command injection
Because Mail does not disallow CRLF in email addresses, an attacker can
inject SMTP commands in specially crafted email addresses passed to
RCPT TO and MAIL FROM.

Not affected by this vulnerability:

  • Ruby 2.4.0+ with a fix for CVE-2015-9096.
  • Applications that do not use SMTP delivery.
  • Applications that validate email addresses to not include CRLF.

The injection attack is described in Terada, Takeshi. "SMTP Injection via
Recipient Email Addresses." 2015. The attacks described in the paper
(Terada, p. 4) can be applied to the library without any modification.

Patched versions: >= 2.5.5
Unaffected versions: none

Changelog

Sourced from mail's changelog.

== Version 2.5.5 - 2017-06-09 Jeremy Daer jeremydaer@gmail.com

Security:

  • #1097 – SMTP security: prevent command injection via To/From addresses. (jeremy)

Bugs:

  • #633 – Cope with message parts that have an empty Content-Type (ThomasKoppensteiner, zeepeeare)
  • #689 - Fix Exim delivery method broken by #477 in 2.5.4. (jethrogb)
Commits
  • 97a8548 2.5.5 release
  • 63fb41b Always use an SSL context. [Fixes #548]
  • f84b84d Specs: fix missing should_receive from f60ccc660434d445b78e8281833c99048a00de20
  • f60ccc6 Fix Mail::Exim, forgotten in 4875bc2b
  • 527067d Gemfile: no rdoc 5 on Ruby 1.9.2
  • 396d39f Clamp down allowed gem versions depending on Ruby version supported
  • b9cee02 Specs: fix expect-style that wasn't backported to old should-style
  • b5a2884 Backport fixes for specs on Ruby 1.9.3+
  • 6110413 Fix tested Ruby versions in README
  • ddc85ed use latest ruby version in CI
  • Additional commits viewable in compare view

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Bumps [mail](https://github.com/mikel/mail) from 2.5.4 to 2.5.5. **This update includes a security fix.**
- [Release notes](https://github.com/mikel/mail/releases)
- [Changelog](https://github.com/mikel/mail/blob/2.5.5/CHANGELOG.rdoc)
- [Commits](mikel/mail@2.5.4...2.5.5)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
@dependabot-preview dependabot-preview bot added dependencies Pull requests that update a dependency file security Pull requests that address a security vulnerability labels Sep 21, 2019
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