Date: Wed, 10 Dec 2014 21:57:09 -0500 (EST) From: "David A. Wheeler" <dwheeler@...eeler.com> To: "oss-security" <oss-security@...ts.openwall.com> Subject: Re: CVE request: Python, standard library HTTP clients On Thu, 11 Dec 2014 02:26:50 +0000, Alex Gaynor <alex.gaynor@...il.com> wrote: > I'm request a CVE for CPython (sometimes Python), for failure to validate > certificates in the HTTP client with TLS. > > Title: Python standard HTTP libraries fail to validate TLS certificates for HTTPS > Products: CPython, all 2.x versions prior to 2.7.9, 3.x versions prior to 3.4.3 > Description: > > When Python's standard library HTTP clients (httplib, urllib, urllib2, > xmlrpclib) are used to access resources with HTTPS, by default the certificate > is not checked against any trust store, nor is the hostname in the certificate > checked against the requested host. It was possible to configure a trust > root to be checked against, however there were no faculties for hostname > checking. ... > Python 2.7.9 has been issued to resolve this issue. It is also resolved in > 3.4.3, which has not yet been released. Awesome!! I am *DELIGHTED* that this serious problem is finally getting fixed. Thank you for your effort! For those curious about this, more information about this is in PEP 0476: http://legacy.python.org/dev/peps/pep-0476/ and these articles: https://lwn.net/Articles/582065/ https://lwn.net/Articles/611243/ This has been the underlying cause of numerous CVEs going back to at least 2010, e.g.: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4340 but the CVEs have always been assigned (to my knowledge) to the applications using Python, and never the library that didn't provide the functionality that developers often expected. I expect a lot of silent vulnerabilities will be removed by this change. --- David A. Wheeler
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