[Bug 1711573] Fix included in openstack/oslo.middleware 3.23.3
OpenStack Infra
1711573 at bugs.launchpad.net
Wed Sep 27 04:22:50 UTC 2017
This issue was fixed in the openstack/oslo.middleware 3.23.3 release.
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https://bugs.launchpad.net/bugs/1711573
Title:
Invalid parsing of Forwarded header (RFC7239)
Status in Ubuntu Cloud Archive:
Fix Committed
Status in Ubuntu Cloud Archive ocata series:
Triaged
Status in Ubuntu Cloud Archive pike series:
Fix Committed
Status in oslo.middleware:
Fix Released
Status in python-oslo.middleware package in Ubuntu:
Fix Released
Status in python-oslo.middleware source package in Zesty:
Fix Committed
Status in python-oslo.middleware source package in Artful:
Fix Released
Bug description:
>>> from oslo_middleware.http_proxy_to_wsgi import HTTPProxyToWSGI
>>> HTTPProxyToWSGI._parse_rfc7239_header("for=192.0.2.60;proto=http, for=192.0.2.60;by=203.0.113.43")
[{'for': '192.0.2.60', 'proto': 'http'}, {' for': '192.0.2.60', 'by': '203.0.113.43'}]
>>>
>>> HTTPProxyToWSGI._parse_rfc7239_header("for=192.0.2.60; proto=http, for=192.0.2.60; by=203.0.113.43")
[{' proto': 'http', 'for': '192.0.2.60'}, {' for': '192.0.2.60', ' by': '203.0.113.43'}]
According to some sources:
https://en.wikipedia.org/wiki/X-Forwarded-For#Alternatives_and_variations
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Forwarded
using space after semicolon in Forwarded header is valid, but
_parse_rfc7239_header does not parse it properly: note spaces in keys
in the dict above.
This affects e.g. Heat when using a proxy+SSL.
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