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https://issues.apache.org/jira/browse/TS-4468?focusedWorklogId=28587&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-28587
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ASF GitHub Bot logged work on TS-4468:
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Author: ASF GitHub Bot
Created on: 09/Sep/16 15:19
Start Date: 09/Sep/16 15:19
Worklog Time Spent: 10m
Work Description: GitHub user shinrich opened a pull request:
https://github.com/apache/trafficserver/pull/1000
TS-4468: http.server_session_sharing.match check SNI
Started with patch proposed by Jered Floyd on the bug. Tested the basic
case of SNI name match/mismatch and reuse seem to work as expected.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/shinrich/trafficserver ts-4468
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/trafficserver/pull/1000.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1000
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commit 262707c9ae1eb929fd1b91821569ff7aa9297f0e
Author: Susan Hinrichs <shinr...@ieee.org>
Date: 2016-09-09T15:14:18Z
TS-4468: http.server_session_sharing.match check SNI
----
Issue Time Tracking
-------------------
Worklog Id: (was: 28587)
Time Spent: 10m
Remaining Estimate: 0h
> http.server_session_sharing.match = both unsafe with HTTPS
> ----------------------------------------------------------
>
> Key: TS-4468
> URL: https://issues.apache.org/jira/browse/TS-4468
> Project: Traffic Server
> Issue Type: Bug
> Components: HTTP, SSL
> Affects Versions: 6.1.1
> Reporter: Jered Floyd
> Assignee: Susan Hinrichs
> Fix For: 7.0.0
>
> Attachments: TS-4468.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> proxy.config.http.server_session_sharing.match has a default value of "both",
> which compares IP address, port, and FQDN when determining whether a
> connection can be reused for further user agent requests.
> The "host" (FQDN) matching does not behave safely when ATS is operating as a
> reverse proxy. The compared value is the origin server FQDN after mapping,
> rather than the initial "Host" target.
> If multiple Hosts map to the same origin server and the scheme is HTTPS, ATS
> will attempt to reuse a connection that may have an SNI Host that does not
> match the HTTP Host. With Apache 2.4 origin servers this results in 400 Bad
> Request to the user agent.
> PROBLEM REPRODUCTION:
> You can observe this behavior with two mapping rules such as:
> map https://example.com/ https://origin.example.com/
> map https://www.example.com/ https://origin.example.com/
> Non-caching clients alternately fetching URIs from the two targets will see
> 400 Bad Request responses intermittently.
> WORKAROUND:
> proxy.config.http.server_session_sharing.match should have a default value of
> "none" when proxy.config.reverse_proxy.enabled is "1"
> SUGGESTED FIXES:
> In order of completeness:
> 1) Do not share server sessions on reverse_proxy requests.
> 2) Do not share server sessions on reverse_proxy requests where scheme is
> HTTPS.
> 3) Compare target host (SNI host) rather than replacement host when
> determining if reuse of server session is allowed (when
> server_session_sharing.match is set to "host" or "both").
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