Bug 1399570 - python-tornado: XSRF protection bypass via cookie parsing differences
Summary: python-tornado: XSRF protection bypass via cookie parsing differences
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1399571
Blocks: 1399574
TreeView+ depends on / blocked
 
Reported: 2016-11-29 10:25 UTC by Andrej Nemec
Modified: 2019-09-29 14:00 UTC (History)
5 users (show)

Fixed In Version: python-tornado 4.4.2
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Environment:
Last Closed: 2016-12-14 05:59:35 UTC
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Description Andrej Nemec 2016-11-29 10:25:11 UTC 
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.

References:

http://www.tornadoweb.org/en/stable/releases/v4.4.2.html
https://hackerone.com/reports/26647

Upstream patch:

https://github.com/tornadoweb/tornado/commit/cb247cb8db7903fda0ca26531c1526e895e10800
Comment 1 Andrej Nemec 2016-11-29 10:25:49 UTC 
Created python-tornado tracking bugs for this issue:

Affects: fedora-24 [bug 1399571]
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