Ubuntu Linux
CVE-2013-4314
MEDIUM
Severity by source
AV:N/AC:M/Au:N/C:N/I:P/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
1Blast Radius
ecosystem impact- 1 pypi packages depend on pyopenssl (1 direct, 0 indirect)
Ecosystem-wide dependent count for version 0.13.1.
DescriptionCVE.org
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.
AnalysisAI
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. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable.
Technical ContextAI
This vulnerability is classified under CWE-20. 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. Affected products include: Jean-Paul Calderone Pyopenssl, Canonical Ubuntu Linux. Version information: before 0.13.1.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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External POC / Exploit Code
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