Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2013-4314

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
30/09/2013
Last modified:
11/04/2025

Description

The X509Extension in pyOpenSSL before 0.13.1 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.

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:a:jean-paul_calderone:pyopenssl:*:*:*:*:*:*:*:* 0.13 (including)
cpe:2.3:a:jean-paul_calderone:pyopenssl:0.7:*:*:*:*:*:*:*
cpe:2.3:a:jean-paul_calderone:pyopenssl:0.8:a1:*:*:*:*:*:*
cpe:2.3:a:jean-paul_calderone:pyopenssl:0.9:*:*:*:*:*:*:*
cpe:2.3:a:jean-paul_calderone:pyopenssl:0.10:*:*:*:*:*:*:*
cpe:2.3:a:jean-paul_calderone:pyopenssl:0.11:*:*:*:*:*:*:*
cpe:2.3:a:jean-paul_calderone:pyopenssl:0.11:a1:*:*:*:*:*:*
cpe:2.3:a:jean-paul_calderone:pyopenssl:0.11:a2:*:*:*:*:*:*
cpe:2.3:a:jean-paul_calderone:pyopenssl:0.12:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:10.04:-:lts:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:-:lts:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:13.04:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools