CVE-2016-0772

Name	CVE-2016-0772
Description	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."
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1663-1, DLA-522-1, DLA-871-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python2.7 (PTS)	buster	2.7.16-2+deb10u1	fixed
	buster (security)	2.7.16-2+deb10u4	fixed
	bullseye	2.7.18-8+deb11u1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
python2.7	source	wheezy	2.7.3-6+deb7u3	DLA-522-1
python2.7	source	jessie	2.7.9-2+deb8u1
python2.7	source	(unstable)	2.7.12~rc1-1
python3.2	source	wheezy	3.2.3-7+deb7u1	DLA-871-1
python3.2	source	(unstable)	(unfixed)
python3.4	source	jessie	3.4.2-1+deb8u2	DLA-1663-1
python3.4	source	(unstable)	(unfixed)
python3.5	source	(unstable)	3.5.2~rc1-1

3.4 branch: https://hg.python.org/cpython/rev/d590114c2394
2.7 branch: https://hg.python.org/cpython/rev/b3ce713fb9be