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GHSA-6748-36qp-fx6r

PyOpenSSL Mishandles NUL Byte In Certificate Subject Alternative Name

Source: GitHub Advisory Database (reviewed) High CVE-2013-4314

Packages

EcosystemPackageAffectedFixed in
PyPI pyOpenSSL < 0.13.1 0.13.1

Details

As written in the advisory (Markdown source, shown as plain text).

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

External links from the advisory. They lead to third-party sites.