CVE-2016-0772
high-risk
Published 2016-09-02
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."
Do I need to act?
~
5.8% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
1 public exploit available
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10
Medium
NETWORK
/ HIGH complexity
Affected Products (20)
Affected Vendors
References (36)
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1303647
Release Notes
https://hg.python.org/cpython/raw-file/v2.7.12/Misc/NEWS
and 16 more references
51
/ 100
high-risk
Severity
20/34 · Moderate
Exploitability
9/34 · Low
Exposure
22/34 · High