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CVE-2016-0772

UNKNOWN
Published 2016-09-02T14:00:00
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No CVSS data available

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."

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-6m57-q338-h677

Advisory Details

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."

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2016-0772
WEB https://bugzilla.redhat.com/show_bug.cgi?id=1303647
WEB https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-5
WEB https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-2
WEB https://hg.python.org/cpython/raw-file/v2.7.12/Misc/NEWS
WEB https://hg.python.org/cpython/rev/b3ce713fb9be
WEB https://hg.python.org/cpython/rev/d590114c2394
WEB https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html
WEB https://security.gentoo.org/glsa/201701-18
WEB http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
WEB http://rhn.redhat.com/errata/RHSA-2016-1626.html
WEB http://rhn.redhat.com/errata/RHSA-2016-1627.html
WEB http://rhn.redhat.com/errata/RHSA-2016-1628.html
WEB http://rhn.redhat.com/errata/RHSA-2016-1629.html
WEB http://rhn.redhat.com/errata/RHSA-2016-1630.html
WEB http://www.openwall.com/lists/oss-security/2016/06/14/9
WEB http://www.securityfocus.com/bid/91225
WEB http://www.splunk.com/view/SP-CAAAPSV
WEB http://www.splunk.com/view/SP-CAAAPUE

Advisory provided by GitHub Security Advisory Database. Published: May 14, 2022, Modified: May 14, 2022

References

https://hg.python.org/cpython/rev/d590114c2394
http://www.splunk.com/view/SP-CAAAPUE
http://rhn.redhat.com/errata/RHSA-2016-1630.html
http://rhn.redhat.com/errata/RHSA-2016-1627.html
https://hg.python.org/cpython/rev/b3ce713fb9be
http://rhn.redhat.com/errata/RHSA-2016-1629.html
http://www.splunk.com/view/SP-CAAAPSV
https://lists.debian.org/debian-lts-announce/2019/02/msg00011.html
https://bugzilla.redhat.com/show_bug.cgi?id=1303647
https://docs.python.org/3.4/whatsnew/changelog.html#python-3-4-5
http://www.openwall.com/lists/oss-security/2016/06/14/9
https://hg.python.org/cpython/raw-file/v2.7.12/Misc/NEWS
https://security.gentoo.org/glsa/201701-18
https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-2
http://www.securityfocus.com/bid/91225
http://rhn.redhat.com/errata/RHSA-2016-1628.html
http://rhn.redhat.com/errata/RHSA-2016-1626.html
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html

HackerOne Reports

CVE-2016-0772 - python: smtplib StartTLS stripping attack None
hxd
Internet Bug Bounty
$1000.00
Cryptographic Issues - Generic
View Report
imap: StartTLS stripping attack (CVE-2016-0772). Medium
sighook
Ruby
$500.00
Cryptographic Issues - Generic
View Report
Published: 2016-09-02T14:00:00
Last Modified: 2024-08-05T22:30:04.119Z
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