CVE-2016-0772

Impact:
Moderate
Public Date:
2016-06-11
Bugzilla:
1303647: CVE-2016-0772 python: smtplib StartTLS stripping attack
It was found that Python's smtplib library did not return an exception when StartTLS failed to be established in the SMTP.starttls() function. A man in the middle attacker could strip out the STARTTLS command without generating an exception on the Python SMTP client application, preventing the establishment of the TLS layer.

Find out more about CVE-2016-0772 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

Red Hat Enterprise Linux 5:
This vulnerability has been rated as having a security impact of Moderate. After evaluation and in accordance with the criteria noted in the product support life cycle, there are no plans to address this issue in an upcoming release. Please contact Red Hat Support for further information.

CVSS v2 metrics

Base Score 5.8
Base Metrics AV:N/AC:M/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None

CVSS v3 metrics

CVSS3 Base Score 4.8
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Impact Low
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Software Collections for Red Hat Enterprise Linux 6 (python27-python) RHSA-2016:1628 2016-08-18
Red Hat Software Collections for Red Hat Enterprise Linux 6 (python33-python) RHSA-2016:1629 2016-08-18
Red Hat Enterprise Linux 6 (python) RHSA-2016:1626 2016-08-18
Red Hat Software Collections for Red Hat Enterprise Linux 6 (rh-python34-python) RHSA-2016:1630 2016-08-18
Red Hat Software Collections for Red Hat Enterprise Linux 7 (python33-python) RHSA-2016:1629 2016-08-18
Red Hat Software Collections for Red Hat Enterprise Linux 7 (python27-python) RHSA-2016:1628 2016-08-18
Red Hat Enterprise Linux 7 (python) RHSA-2016:1626 2016-08-18
Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-python34-python) RHSA-2016:1630 2016-08-18
Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-python35-python) RHSA-2016:1627 2016-08-18

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 python Will not fix
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.
Last Modified