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PYSEC-2013-31

Quick fix

PYSEC-2013-31 — pyopenssl: upgrade to the fixed version with the command below.

pip install --upgrade 'pyopenssl>=0.13.1'

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/pyopenssl

Introduced in: 0Fixed in: 0.13.1

Fixpip install --upgrade 'pyopenssl>=0.13.1'

References

http://www.openwall.com/lists/oss-security/2013/09/06/2[WEB]
https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html[WEB]
https://bugzilla.redhat.com/show_bug.cgi?id=1005325[REPORT]
http://www.ubuntu.com/usn/USN-1965-1[ADVISORY]
http://www.debian.org/security/2013/dsa-2763[ADVISORY]
http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html[WEB]
https://github.com/advisories/GHSA-6748-36qp-fx6r[ADVISORY]