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The smtplib library in CPython (aka Python) before 2.7.12 3.x before 3.4.5 and 3.5.x before 3.5.2 does not return an error when StartTLS fails – CVE-2016-0772

oval:org.cisecurity:def:1256

The smtplib library in CPython (aka Python) before 2.7.12 3.x before 3.4.5 and 3.5.x before 3.5.2 does not return an error when StartTLS fails which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command aka a "StartTLS stripping attack."

Family:
windows
Status:
ACCEPTED
Platform(s):
  • Microsoft Windows 7
  • Microsoft Windows 8
  • Microsoft Windows 8.1
  • Microsoft Windows 10
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2008 R2
  • Microsoft Windows Server 2012
Class:
vulnerability
Reference(s):
  • CVE-2016-0772
Product(s):
  • Python