CVE-2013-4314: PyOpenSSL Mishandles NUL Byte In Certificate Subject Alternative Name
(updated )
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.
References
- bugzilla.redhat.com/show_bug.cgi?id=1005325
- github.com/advisories/GHSA-6748-36qp-fx6r
- github.com/pyca/pyopenssl
- github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2
- github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml
- mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
- nvd.nist.gov/vuln/detail/CVE-2013-4314
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