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CVE-2016-0772

Published: 2 September 2016

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."

Notes

AuthorNote
sbeattie
issue is fixed for xenial/python3.5 and xenial/python2.7
for packages in xenial-updates, but not xenial-security
Priority

Medium

CVSS 3 base score: 6.5

Status

Package Release Status
python2.7
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(2.7.12-3)
disco Not vulnerable
(2.7.12-3)
eoan Not vulnerable
(2.7.12-3)
focal Not vulnerable
(2.7.12-3)
groovy Not vulnerable
(2.7.12-3)
hirsute Not vulnerable
(2.7.12-3)
impish Not vulnerable
(2.7.12-3)
jammy Not vulnerable
(2.7.12-3)
precise
Released (2.7.3-0ubuntu3.9)
trusty
Released (2.7.6-8ubuntu0.3)
upstream
Released (2.7.12~rc1-1)
wily Ignored
(reached end-of-life)
xenial
Released (2.7.12-1ubuntu0~16.04.1)
yakkety Not vulnerable
(2.7.12-3)
zesty Not vulnerable
(2.7.12-3)
Patches:
upstream: https://hg.python.org/cpython/rev/b3ce713fb9be

python3.2
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise Does not exist
(precise was released [3.2.3-0ubuntu3.8])
trusty Does not exist

upstream Needs triage

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

python3.4
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise Does not exist

trusty
Released (3.4.3-1ubuntu1~14.04.5)
upstream Needs triage

wily Ignored
(reached end-of-life)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

Patches:

upstream: https://hg.python.org/cpython/rev/d590114c2394
python3.5
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

precise Does not exist

trusty Needs triage

upstream
Released (3.5.2~rc1-1)
wily Ignored
(reached end-of-life)
xenial
Released (3.5.2-2ubuntu0~16.04.1)
yakkety Not vulnerable
(3.5.2-1)
zesty Not vulnerable
(3.5.2-1)