Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2013-4238

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
18/08/2013
Last modified:
11/04/2025

Description

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

Vector 2.0
AV:N/AC:M/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0
4.30
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:canonical:ubuntu_linux:10.04:-:lts:*:*:*:*:*
cpe:2.3:a:python:python:2.6.1:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.6.2:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.6.3:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.6.4:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.6.5:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.6.6:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.6.7:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.6.8:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.6.2150:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.6.6150:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.7.1:*:*:*:*:*:*:*
cpe:2.3:a:python:python:2.7.1:rc1:*:*:*:*:*:*
cpe:2.3:a:python:python:2.7.2:rc1:*:*:*:*:*:*
cpe:2.3:a:python:python:2.7.3:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools