Protection Mechanism Failure Affecting python3.4 package, versions <3.4.3-1ubuntu1~14.04.5
Threat Intelligence
Snyk has a published code exploit for this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1404-PYTHON34-306415
- published2 Sept 2016
- disclosed2 Sept 2016
Introduced: 2 Sep 2016
CVE-2016-0772 (opens in a new tab)How to fix?
Upgrade Ubuntu:14.04 python3.4 to version 3.4.3-1ubuntu1~14.04.5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python3.4 package and not the python3.4 package as distributed by Ubuntu.
See How to fix? for Ubuntu:14.04 relevant fixed versions and status.
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."
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-0772
- https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-5
- https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-2
- https://hg.python.org/cpython/raw-file/v2.7.12/Misc/NEWS
- https://hg.python.org/cpython/rev/b3ce713fb9be
- https://hg.python.org/cpython/rev/d590114c2394
- http://www.splunk.com/view/SP-CAAAPSV
- http://www.splunk.com/view/SP-CAAAPUE
- https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html
- https://security-tracker.debian.org/tracker/CVE-2016-0772
- https://security.gentoo.org/glsa/201701-18
- http://www.openwall.com/lists/oss-security/2016/06/14/9
- https://bugzilla.redhat.com/show_bug.cgi?id=1303647
- http://rhn.redhat.com/errata/RHSA-2016-1626.html
- http://rhn.redhat.com/errata/RHSA-2016-1627.html
- http://rhn.redhat.com/errata/RHSA-2016-1628.html
- http://rhn.redhat.com/errata/RHSA-2016-1629.html
- http://rhn.redhat.com/errata/RHSA-2016-1630.html
- http://www.securityfocus.com/bid/91225
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
- https://www.exploit-db.com/exploits/43500