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."
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
Sign in to view the affected projects.
Advisories
| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-522-1 | python2.7 security update |
Debian DLA |
DLA-871-1 | python3.2 security update |
Debian DLA |
DLA-1663-1 | python3.4 security update |
Ubuntu USN |
USN-3134-1 | Python vulnerabilities |
References
History
Sat, 12 Jul 2025 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
epss
|
epss
|
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2024-08-05T22:30:04.119Z
Reserved: 2015-12-16T00:00:00.000Z
Link: CVE-2016-0772
No data.
Status : Modified
Published: 2016-09-02T14:59:00.127
Modified: 2026-05-06T22:30:45.220
Link: CVE-2016-0772
OpenCVE Enrichment
No data.
Weaknesses
Debian DLA
Ubuntu USN