CVE-2016-0772

Published: 02 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."

Priority

Medium

CVSS 3 base score: 6.5

Status

Package Release Status
python2.7
Launchpad, Ubuntu, Debian
Upstream
Released (2.7.12~rc1-1)
Ubuntu 21.10 (Impish Indri) Not vulnerable
(2.7.12-3)
Ubuntu 21.04 (Hirsute Hippo) Not vulnerable
(2.7.12-3)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(2.7.12-3)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(2.7.12-3)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (2.7.12-1ubuntu0~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (2.7.6-8ubuntu0.3)
Patches:
Upstream: https://hg.python.org/cpython/rev/b3ce713fb9be
python3.2
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.10 (Impish Indri) Does not exist

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

python3.4
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.10 (Impish Indri) Does not exist

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr)
Released (3.4.3-1ubuntu1~14.04.5)
Patches:
Upstream: https://hg.python.org/cpython/rev/d590114c2394
python3.5
Launchpad, Ubuntu, Debian
Upstream
Released (3.5.2~rc1-1)
Ubuntu 21.10 (Impish Indri) Does not exist

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus)
Released (3.5.2-2ubuntu0~16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Needs triage

Notes

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

References