2016-09-02 16:59:00 2019-02-09 12:29:00

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."

Vector

NETWORK

Complexity

MEDIUM

Authentication

NONE

Confidentiality

PARTIAL

Integrity

PARTIAL

Availability

NONE