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Vigil@nce - Python: bypassing X.509 check

December 2014 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can setup a malicious HTTPS server, and invite a
Python client to connect, without detecting that the web server
uses the certificate from another site.

Impacted products: Python

Severity: 2/4

Creation date: 11/12/2014

DESCRIPTION OF THE VULNERABILITY

An SSL client must check that the host name included in the X.509
certificate received from the server is the one of the targeted
server.

However, HTTPS clients of Python do not perform this check.

An attacker can therefore setup a malicious HTTPS server, and
invite a Python client to connect, without detecting that the web
server uses the certificate from another site.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Python-bypassing-X-509-check-15786


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