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Last updated: 4/18/2014

CVE Publication rate: 20.33

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National Cyber Awareness System

Vulnerability Summary for CVE-2013-4238

Original release date: 08/17/2013
Last revised: 03/26/2014
Source: US-CERT/NIST

Overview

The ssl.match_hostname function in the SSL module in Python 2.6 through 3.4 does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.3 (MEDIUM) (AV:N/AC:M/AU:N/C:N/I:P/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized modification

References to Advisories, Solutions, and Tools

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External Source: CONFIRM
Name: http://bugs.python.org/issue18709
Type: Patch Information
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=996381
Type: Patch Information
External Source: SUSE
Name: openSUSE-SU-2013:1463
Type: Advisory
External Source: SUSE
Name: openSUSE-SU-2013:1439
Type: Advisory
External Source: SUSE
Name: openSUSE-SU-2013:1437
Type: Advisory
External Source: SUSE
Name: openSUSE-SU-2013:1462
Type: Advisory
External Source: SUSE
Name: openSUSE-SU-2013:1440
Type: Advisory
External Source: REDHAT
Name: RHSA-2013:1582
External Source: DEBIAN
Name: DSA-2880
External Source: UBUNTU
Name: USN-1982-1
Type: Advisory
External Source: SUSE
Name: openSUSE-SU-2013:1438
Type: Advisory

Technical Details

Vulnerability Type (View All)