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."
Published 2016-09-02 14:59:00
Updated 2019-02-09 11:29:00
Source Red Hat, Inc.
View at NVD,   CVE.org

Threat overview for CVE-2016-0772

Top countries where our scanners detected CVE-2016-0772
Top open port discovered on systems with this issue 8123
IPs affected by CVE-2016-0772 129,963
Threat actors abusing to this issue? Yes
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Exploit prediction scoring system (EPSS) score for CVE-2016-0772

1.63%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 87 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2016-0772

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.8
MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:N
8.6
4.9
NIST
6.5
MEDIUM CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
2.2
4.2
NIST

CWE ids for CVE-2016-0772

  • The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-0772

Products affected by CVE-2016-0772

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