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Sicherheit: Cross-Site Request Forgery in python-tornado
Aktuelle Meldungen Distributionen
Name: Cross-Site Request Forgery in python-tornado
ID: FEDORA-2016-a3618d9ef6
Distribution: Fedora
Plattformen: Fedora 24
Datum: Di, 13. Dezember 2016, 09:37
Referenzen: https://bugzilla.redhat.com/show_bug.cgi?id=1399570

Originalnachricht

Name        : python-tornado
Product : Fedora 24
Version : 4.4.2
Release : 1.fc24
URL : http://www.tornadoweb.org
Summary : Scalable, non-blocking web server and tools
Description :
Tornado is an open source version of the scalable, non-blocking web
server and tools.

The framework is distinct from most mainstream web server frameworks
(and certainly most Python frameworks) because it is non-blocking and
reasonably fast. Because it is non-blocking and uses epoll, it can
handle thousands of simultaneous standing connections, which means it is
ideal for real-time web services.

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Update Information:

Update to 4.4.2 Security fixes * A difference in cookie parsing between
Tornado and web browsers (especially when combined with Google Analytics) could
allow an attacker to set arbitrary cookies and bypass XSRF protection. The
cookie parser has been rewritten to fix this attack. Backwards-compatibility
notes * Cookies containing certain special characters (in particular
semicolon and square brackets) are now parsed differently. * If the cookie
header contains a combination of valid and invalid cookies, the valid ones will
be returned (older versions of Tornado would reject the entire header for a
single invalid cookie). See also
http://tornado.readthedocs.io/en/stable/releases/v4.4.0.html
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References:

[ 1 ] Bug #1399570 - python-tornado: XSRF protection bypass via cookie
parsing differences
https://bugzilla.redhat.com/show_bug.cgi?id=1399570
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade python-tornado' at the command line.
For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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