CVE-2013-4314

MediumCVSS 4.3/10Last modified Jun 16, 2026

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.

Metrics

CVSS 2.0 4.3/10AV:N/AC:M/Au:N/C:N/I:P/A:N

Weakness enumeration

CWE-20

Affected software

VendorProductVersions
n/an/an/a

References

Timeline

Published
Sep 30, 2013
Last modified
Jun 16, 2026
NVD status
Modified

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CVE-2013-4314: Medium severity, CVSS 4.3 | Vulnix