Description

The HTTP clients in the (1) httplib, (2) urllib, (3) urllib2, and (4) xmlrpclib libraries in CPython (aka Python) 2.x before 2.7.9 and 3.x before 3.4.3, when accessing an HTTPS URL, do not (a) check the certificate against a trust store or verify that the server hostname matches a domain name in the subject's (b) Common Name or (c) subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

References

http://bugs.python.org/issue22417

http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html

http://www.openwall.com/lists/oss-security/2014/12/11/1

http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html

http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html

http://www.securityfocus.com/bid/71639

https://access.redhat.com/errata/RHSA-2016:1166

https://access.redhat.com/errata/RHSA-2017:1162

https://access.redhat.com/errata/RHSA-2017:1868

https://security.gentoo.org/glsa/201503-10

https://support.apple.com/kb/HT205031

https://www.python.org/dev/peps/pep-0476/

https://www.python.org/downloads/release/python-279/

Details

Risk Information

CVSS v2