eGenix pyOpenSSL Distribution 0.13.12 GA

eGenix pyOpenSSL Distribution 0.13.12 GA

eGenix is pleased to announce the eGenix pyOpenSSL Distribution 0.13.12 for Python 2.4 - 2.7, with source, OpenSSL libraries, CA bundles and binaries for Windows, Linux, Mac OS X and FreeBSD.


The pyOpenSSL Distribution includes everything you need to get started with SSL in Python. It comes with an easy to use installer that includes the most recent OpenSSL library versions in pre-compiled
form, making your application independent of OS provided OpenSSL libraries:

>>>   eGenix pyOpenSSL Distribution Page

pyOpenSSL is an open-source Python add-on that allows writing SSL-aware networking applications as as certificate managment tools. It uses the OpenSSL library as performant and robust SSL engine.

OpenSSL is an open-source implementation of the SSL/TLS protocol.


This new release of the pyOpenSSL Distribution includes the following updates:

New in OpenSSL

  • CVE-2015-3194 The signature verification routines will crash with a NULL pointer dereference, if presented with an ASN.1 signature using the RSA PSS algorithm and absent mask generation function parameter. This can be exploited in as DoS attack in applications which performs certificate verification.
  • CVE-2015-3195: When presented with a malformed X509_ATTRIBUTE structure OpenSSL will leak memory.
  • CVE-2015-3196: If PSK identity hints are received by a multi-threaded client, then the values are wrongly updated in the parent SSL_CTX structure. This can potentially lead to a double free of the identify hint data, leading to a segfault.
  • Updated the Mozilla CA root bundle to version 2015-10-27.
  • Added support to allow building wheels from source or prebuilt packages.
Please see the product changelog for the full set of changes.

pyOpenSSL / OpenSSL Binaries Included

In addition to providing sources, we make binaries available that include both pyOpenSSL and the necessary OpenSSL libraries for all supported platforms: Windows, Linux, Mac OS X and FreeBSD, for x86 and x64.

To simplify installation, we have uploaded a web installer to PyPI which will automatically choose the right binary for your platform, so a simple

pip install egenix-pyopenssl

will get you the package with OpenSSL libraries installed. Please see our installation instructions for details.

We have also added .egg-file distribution versions of our pyOpenSSL Distribution for Windows, Linux and Mac OS X to the available download options. These make setups using e.g. zc.buildout and other egg-file based installers a lot easier.


Please visit the eGenix pyOpenSSL Distribution page for downloads, instructions on installation and documentation of the package.


Before installing this version of pyOpenSSL, please make sure that you uninstall any previously installed pyOpenSSL version. Otherwise, you could end up not using the included OpenSSL libs.

More Information

For more information on the eGenix pyOpenSSL Distribution, licensing and download instructions, please write to

Enjoy !

Marc-Andre Lemburg,

Published: 2015-12-08