CVE-2016-0772 Detail

Current 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."


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  6.5 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
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.openwall.com/lists/oss-security/2016/06/14/9 Mailing List 
http://www.securityfocus.com/bid/91225
http://www.splunk.com/view/SP-CAAAPSV
http://www.splunk.com/view/SP-CAAAPUE
https://bugzilla.redhat.com/show_bug.cgi?id=1303647 Issue Tracking  Third Party Advisory 
https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-5 Release Notes 
https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-2 Release Notes 
https://hg.python.org/cpython/raw-file/v2.7.12/Misc/NEWS Release Notes 
https://hg.python.org/cpython/rev/b3ce713fb9be Patch 
https://hg.python.org/cpython/rev/d590114c2394 Patch 
https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html
https://security.gentoo.org/glsa/201701-18

Weakness Enumeration

CWE-ID CWE Name Source
CWE-693 Protection Mechanism Failure cwe source acceptance level NIST  

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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-0772
NVD Published Date:
09/02/2016
NVD Last Modified:
02/09/2019
Source:
Red Hat, Inc.