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.
Published: 2013-09-30
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-2763-1 pyopenssl security update
EUVD EUVD EUVD-2013-0029 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.
Github GHSA Github GHSA GHSA-6748-36qp-fx6r PyOpenSSL Mishandles NUL Byte In Certificate Subject Alternative Name
Ubuntu USN Ubuntu USN USN-1965-1 pyOpenSSL vulnerability
History

No history.

Subscriptions

Canonical Ubuntu Linux
Jean-paul Calderone Pyopenssl
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-06T16:38:01.984Z

Reserved: 2013-06-12T00:00:00.000Z

Link: CVE-2013-4314

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2013-09-30T21:55:09.583

Modified: 2026-04-29T01:13:23.040

Link: CVE-2013-4314

cve-icon Redhat

Severity : Moderate

Publid Date: 2013-09-04T00:00:00Z

Links: CVE-2013-4314 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses