CVE-2016-0772

2016-09-0200:00:00

ubuntu.com

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

0.016 Low

EPSS

Percentile

87.4%

JSON

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

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

OSVersionArchitecturePackageVersionFilename
ubuntu12.04noarchpython2.7< 2.7.3-0ubuntu3.9UNKNOWN
ubuntu14.04noarchpython2.7< 2.7.6-8ubuntu0.3UNKNOWN
ubuntu16.04noarchpython2.7< 2.7.12-1ubuntu0~16.04.1UNKNOWN
ubuntu12.04noarchpython3.2< 3.2.3-0ubuntu3.8UNKNOWN
ubuntu14.04noarchpython3.4< 3.4.3-1ubuntu1~14.04.5UNKNOWN
ubuntu14.04noarchpython3.5< 3.5.2-2ubuntu0~16.04.4~14.04.1UNKNOWN
ubuntu16.04noarchpython3.5< 3.5.2-2ubuntu0~16.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	12.04	noarch	python2.7	< 2.7.3-0ubuntu3.9	UNKNOWN
ubuntu	14.04	noarch	python2.7	< 2.7.6-8ubuntu0.3	UNKNOWN
ubuntu	16.04	noarch	python2.7	< 2.7.12-1ubuntu0~16.04.1	UNKNOWN
ubuntu	12.04	noarch	python3.2	< 3.2.3-0ubuntu3.8	UNKNOWN
ubuntu	14.04	noarch	python3.4	< 3.4.3-1ubuntu1~14.04.5	UNKNOWN
ubuntu	14.04	noarch	python3.5	< 3.5.2-2ubuntu0~16.04.4~14.04.1	UNKNOWN
ubuntu	16.04	noarch	python3.5	< 3.5.2-2ubuntu0~16.04.1	UNKNOWN