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
| Author | Note |
|---|---|
| sbeattie | issue is fixed for xenial/python3.5 and xenial/python2.7 for packages in xenial-updates, but not xenial-security |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
python2.7 Launchpad, Ubuntu, Debian |
upstream |
Released
(2.7.12~rc1-1)
|
| precise |
Released
(2.7.3-0ubuntu3.9)
|
|
| trusty |
Released
(2.7.6-8ubuntu0.3)
|
|
| wily |
Ignored
(end of life)
|
|
| xenial |
Released
(2.7.12-1ubuntu0~16.04.1)
|
|
| yakkety |
Not vulnerable
(2.7.12-3)
|
|
| 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)
|
|
| impish |
Not vulnerable
(2.7.12-3)
|
|
| groovy |
Not vulnerable
(2.7.12-3)
|
|
| hirsute |
Not vulnerable
(2.7.12-3)
|
|
| kinetic |
Not vulnerable
(2.7.12-3)
|
|
| lunar |
Does not exist
|
|
| zesty |
Not vulnerable
(2.7.12-3)
|
|
| jammy |
Not vulnerable
(2.7.12-3)
|
|
|
Patches: upstream: https://hg.python.org/cpython/rev/b3ce713fb9be |
||
|
python3.2 Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
| bionic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| wily |
Does not exist
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
| zesty |
Does not exist
|
|
| precise |
Released
(3.2.3-0ubuntu3.8)
|
|
|
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
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Released
(3.4.3-1ubuntu1~14.04.5)
|
|
| upstream |
Needs triage
|
|
| wily |
Ignored
(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
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Released
(3.5.2-2ubuntu0~16.04.4~14.04.1)
|
|
| upstream |
Released
(3.5.2~rc1-1)
|
|
| wily |
Ignored
(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)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N |