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FreeBSD: Python -- smtplib StartTLS stripping vulnerability (CVE-2016-0772)

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FreeBSD: Python -- smtplib StartTLS stripping vulnerability (CVE-2016-0772)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Published
06/14/2016
Created
07/25/2018
Added
07/04/2016
Modified
10/30/2017

Description

Red Hat reports: A vulnerability in smtplib allowing MITM attacker to perform a startTLS stripping attack. smtplib does not seem to raise an exception when the remote end (smtp server) is capable of negotiating starttls but fails to respond with 220 (ok) to an explicit call of SMTP.starttls(). This may allow a malicious MITM to perform a startTLS stripping attack if the client code does not explicitly check the response code for startTLS.

Solution(s)

  • freebsd-upgrade-package-python27
  • freebsd-upgrade-package-python33
  • freebsd-upgrade-package-python34
  • freebsd-upgrade-package-python35

References

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