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Protection Mechanism Failure Affecting python3.5 package, versions <3.5.2-2ubuntu0~16.04.4~14.04.1

Severity

 Recommended
0.0
medium
0
10

Based on Ubuntu security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    1.63% (88th percentile)

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  • Snyk ID SNYK-UBUNTU1404-PYTHON35-1641760
  • published 2 Sep 2016
  • disclosed 2 Sep 2016
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Introduced: 2 Sep 2016

CVE-2016-0772 Open this link in a new tab
CWE-693 Open this link in a new tab

How to fix?

Upgrade Ubuntu:14.04 python3.5 to version 3.5.2-2ubuntu016.04.414.04.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.5 package and not the python3.5 package as distributed by Ubuntu. See How to fix? for Ubuntu:14.04 relevant fixed versions and status.

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."

References