DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-09-24 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #22 from William A. Rowe Jr. wr...@apache.org 2010-09-24 02:20:07 
EDT ---
The question was raised; Microsoft released a spec

In this case, only the IETF defines HTTP.

If it complies with HTTP, then anyone is free to build upon it.  See the DAV
spec for one example.

If it fails to comply with HTTP, it isn't HTTP, and the ASF HTTP Server project
is unlikely to pay attention; *particularly* if it masquerades as HTTP and is
not.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-09-24 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

William A. Rowe Jr. wr...@apache.org changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution||INVALID

--- Comment #23 from William A. Rowe Jr. wr...@apache.org 2010-09-24 02:22:51 
EDT ---
Final note of the day; I've broached the question on the ietf-http-wg list for
pointers to any MS bug or KB references to this misimplementation, and pointers
to where users can raise the issue.  I have yet to hear back, but when I do
I'll update this report.

In the interim, after lengthy consideration, this is not an httpd proxy flaw.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-27 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

Ray Van Dolson rvandol...@esri.com changed:

   What|Removed |Added

 CC||rvandol...@esri.com

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-27 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #19 from Ray Van Dolson rvandol...@esri.com 2010-07-27 14:50:05 
EDT ---
I understand the ethical reasons for wanting to implement this, but it would be
nice to have perhaps some override options we could specify in a per
Directory context.

I was initially thinking of pre-mangling the Content-Length header, but I doubt
this would consistently provide the desired result.

Apache does have other workarounds for goofy non-compliant stuff...

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-27 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #20 from Ray Van Dolson rvandol...@esri.com 2010-07-27 14:50:51 
EDT ---
(In reply to comment #19)
 I understand the ethical reasons for wanting to implement this, but it would 
 be

This should be for *not* wanting. :)

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-27 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #21 from William A. Rowe Jr. wr...@apache.org 2010-07-27 15:05:09 
EDT ---
 Why not open the request to the back-end right away?
 It would improve performance even on regular GET requests

In fact, it does nothing of the kind, it increases the contention for 
the backend servers.  The current behavior is correct for taking the stress
of the much more computationally intensive backend applications.

HTTP/1.1 Content-Length description is prescriptive of the server's behavior,
and this incorrectly implemented protocol could have *trivially* used the
semantically sensible chunked encoding methodology.

The one and only hack around HTTP/1.1 non-compliance is to open a connection 
oriented stream and distrust the entire communications stream.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-21 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

Kenny Colliander Nordin ke...@najt.nu changed:

   What|Removed |Added

 CC||ke...@najt.nu

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-16 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #10 from William A. Rowe Jr. wr...@apache.org 2010-07-16 11:37:59 
EDT ---
Hans, this is an HTTP protocol question, unrecognized methods are allowed
but they must follow HTTP/1.1 itself, and if MS's protocol isn't HTTP/1.1
compliant, we won't be accommodating.

HTTP/1.1 is not bi-sync, it is message/resource oriented.

You have stated that 100 bytes of the request message are sent, and that we
are blocking for 8kb; what is the Content-Length header of this case?

There is a not-altogether unreasonable solve to this but it's not trivial; use 
proxy_connect for specific methods which turn out to be HTTP/1.1 non-compliant,
which would turn the tunnel into a connection stream.  Patches welcome.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-16 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #11 from Hans Maurer h...@red.roses.de 2010-07-16 13:35:26 EDT ---
William,

since you're addressing me personally:  We've move to a VPN-based solution long
ago, so I don't need this functionality anymore.

However, there several comments votes by other people, and I also occasionally
get mails from people asking me how I worked around this problem.  So, there
still seems to be some demand for this feature out there.

Best regards,
  Hans

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-16 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

William A. Rowe Jr. wr...@apache.org changed:

   What|Removed |Added

 Status|REOPENED|NEEDINFO

--- Comment #12 from William A. Rowe Jr. wr...@apache.org 2010-07-16 14:14:50 
EDT ---
If you can remember that the 100-byte request carried 100 byte content-length,
or was definitely larger, that would help.

Anyone; if you have the opportunity to sniff the httpd - backend connection
and
post what leads to this hang on the near side of the conversation, that would
be 
great.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-16 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #14 from Hans Maurer h...@red.roses.de 2010-07-16 14:24:48 EDT ---
(In reply to comment #13)
 The upstream request had a Content-Length header of about 2 GB.

Oh, actually 1 GB, not 2 GB.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-16 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #13 from Hans Maurer h...@red.roses.de 2010-07-16 14:23:03 EDT ---
William,

actually, there were(*) two parallel HTTP requests, one for traffic from
Outlook to Exchange and one for traffic from Exchange to Outlook.  The
upstream request had a Content-Length header of about 2 GB.  The initial
ticket description (and my other comments from 2006) contain the headers of
both requests as well as an analysis why Apache's buffering causes a deadlock
on Microsoft's - well - creative RPC over HTTP implementation.

(*) That was Outlook 2003 with Exchange 2003.  I never checked for Outlook
2007/2010 and Exchange 2008.

Best regards,
  Hans

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-16 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

William A. Rowe Jr. wr...@apache.org changed:

   What|Removed |Added

 Status|NEEDINFO|NEW

--- Comment #16 from William A. Rowe Jr. wr...@apache.org 2010-07-16 14:36:53 
EDT ---
Still/now 'new'

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-16 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

William A. Rowe Jr. wr...@apache.org changed:

   What|Removed |Added

   Priority|P4  |P5
   Severity|normal  |enhancement

--- Comment #15 from William A. Rowe Jr. wr...@apache.org 2010-07-16 14:36:16 
EDT ---
Ok, so that's a 1GB  'open ended' pipe, and it expected synchronicity which 
it's absolutely not allowed to do.

Thanks for clarifying, that's what I thought you were getting at.

Will ponder interesting solutions, but in the interim it is HTTP/1.1 abuse.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-16 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #17 from Graham Mainwaring gra...@mhn.org 2010-07-16 15:46:57 EDT 
---
I don't think it's HTTP 1.1 abuse. I can't find anything in RFC2068 that speaks
to this point one way or the other. I don't think it's required for mod_proxy
to implement this, but it certainly would not be RFC-violating to do so.

Suppose a back-end server sends a response with content-length: 1000 but only
sends 100 bytes. In that case mod_proxy transmits the 100 bytes to the
requestor and waits for further data.

But if the incoming request has content-length: 1000 but only sends 100 bytes,
mod_proxy just sits there. Why not open the request to the back-end right away?
It would improve performance even on regular GET requests, because you're
making use of time that would otherwise be wasted on network latency to get the
back-end connection open, which means you'll be able to generate a response
that much faster. If you have all the HTTP headers and part of the request
data, what's the benefit in *not* starting the connection to the back-end,
since you know you're going to need it?

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-16 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #18 from Graham Mainwaring gra...@mhn.org 2010-07-16 15:56:29 EDT 
---
Also, regarding vulnerability CVE-2005-2088, surely this can be solved by
improving the header parsing rather than by destroying useful functionality
that people were using.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-13 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #8 from Emmanuel Fusté emmanuel.fu...@laposte.net 2010-07-13 
08:59:25 EDT ---
(In reply to comment #7)
 (In reply to comment #6)
  Hello,
  
  with Apache 2.2.11 it is still not functioning. Microsoft released a 
  protocol
  specification here: http://msdn.microsoft.com/en-us/library/cc243950.aspx
 
 Quoting from that:
 
 Patents. Microsoft has patents that may cover your implementations of the
 technologies described in the Open Specifications. Neither this notice nor
 Microsoft's delivery of the documentation grants any licenses under those or
 any other Microsoft patents.
 

Sorry I could not buy this kind of argument.
It is not about implementing RPC over http, but about letting RCP over http
pass through.
This is a silly Apache httpd limitation for no good.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2010-07-13 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

--- Comment #9 from Emmanuel Fusté emmanuel.fu...@laposte.net 2010-07-13 
09:00:12 EDT ---
(In reply to comment #7)
 (In reply to comment #6)
  Hello,
  
  with Apache 2.2.11 it is still not functioning. Microsoft released a 
  protocol
  specification here: http://msdn.microsoft.com/en-us/library/cc243950.aspx
 
 Quoting from that:
 
 Patents. Microsoft has patents that may cover your implementations of the
 technologies described in the Open Specifications. Neither this notice nor
 Microsoft's delivery of the documentation grants any licenses under those or
 any other Microsoft patents.
 

Sorry I could not buy this kind of argument.
It is not about implementing RPC over http, but about letting RPC over http
pass through.
This is a silly Apache httpd limitation for no good.

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2009-10-06 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029

Graham Mainwaring gra...@mhn.org changed:

   What|Removed |Added

 CC||gra...@mhn.org

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2009-06-07 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029





--- Comment #7 from Nick Kew n...@webthing.com  2009-06-07 00:40:26 PST ---
(In reply to comment #6)
 Hello,
 
 with Apache 2.2.11 it is still not functioning. Microsoft released a protocol
 specification here: http://msdn.microsoft.com/en-us/library/cc243950.aspx

Quoting from that:

Patents. Microsoft has patents that may cover your implementations of the
technologies described in the Open Specifications. Neither this notice nor
Microsoft's delivery of the documentation grants any licenses under those or
any other Microsoft patents.

MS is not a standards body, and their having published something doesn't mean
it's been peer-reviewed, or even implemented!  I don't see any guarantee that
if Apache implements exactly what's written, it really will interoperate with
MS technology.  Maybe there's a test suite, but who would look that far after
reading the patent threat?

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DO NOT REPLY [Bug 40029] mod_proxy should interoperate with RPC over HTTP

2009-06-06 Thread bugzilla
https://issues.apache.org/bugzilla/show_bug.cgi?id=40029


m...@familiekling.de changed:

   What|Removed |Added

 Status|RESOLVED|REOPENED
 Resolution|INVALID |




--- Comment #6 from m...@familiekling.de  2009-06-06 15:09:52 PST ---
Hello,

with Apache 2.2.11 it is still not functioning. Microsoft released a protocol
specification here: http://msdn.microsoft.com/en-us/library/cc243950.aspx

Does that change anything? Is there a chance that apache will support rpc over
http in the future? I think there is a major interest to use apache as a proxy
for possibly insecure IIS applications like this. thank you!

Regards
Christoph Kling

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DO NOT REPLY [Bug 40029] - mod_proxy should interoperate with RPC over HTTP

2006-07-13 Thread bugzilla
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--- Additional Comments From [EMAIL PROTECTED]  2006-07-13 10:14 ---
The fix for CVE-2005-2088 was simply to discard the C-L header if a T-E header
was also present, that was a change to request.c and the changes to the proxy
are entirely unrelated.

I don't see why this shouldn't work; the requests are syntactically valid, the
proxy doesn't are about method semantics.  Why is it timing out?  Because it
attempts to prefetch 8K and the 100 bytes sent are not enough? That is pretty
icky.

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DO NOT REPLY [Bug 40029] - mod_proxy should interoperate with RPC over HTTP

2006-07-13 Thread bugzilla
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--- Additional Comments From [EMAIL PROTECTED]  2006-07-13 16:53 ---
(In reply to comment #4)
 Why is it timing out?  Because it
 attempts to prefetch 8K and the 100 bytes sent are not enough?

Yes, I think so.  Outlook sends 100 bytes, and then waits for a response on
the second connection before sending additional data.  OTOH, Apache waits for
additional data before relaying the 100 bytes to the Exchange server in the
first place.  Classic deadlock.

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DO NOT REPLY [Bug 40029] - mod_proxy should interoperate with RPC over HTTP

2006-07-12 Thread bugzilla
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[EMAIL PROTECTED] changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution||INVALID




--- Additional Comments From [EMAIL PROTECTED]  2006-07-12 15:32 ---
(In reply to comment #0)

 ssldump on the Apache 2.2.2 machine shows that the RPC_OUT_DATA is correctly
 forwarded to the Exchange server.  For the RPC_IN_DATA, OTOH, the proxy 
 doesn't
 even open a connection to the Exchange server.  I can only guess that's it's
 trying to read (prefetch?) a part or all of the 1073741824 bytes
 (Content-Length) before opening the session to the Exchange server.

Correct, we prefetch the whole body to avoid HTTP smuggling attacks with invalid
Content-Length headers. This is a security fix in 2.2.x and = 2.0.55. (see
http://httpd.apache.org/security/vulnerabilities_20.html and
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2088). Correct me if I am
wrong but I do not think that RPC_IN_DATA and RPC_OUT_DATA are specfied in any 
RFC.

 
 Unfortunately, the client only sends a small request (~ 100 bytes) on the IN
 connection and starts waiting for a response on the OUT connection. It never
 gets one, though, since the request hasn't reached the Exchange server yet.

This is an incorrect use of the http protocol. Bad luck for Microsoft.

So I do not see any chance that we can do anything here. = Invalid


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DO NOT REPLY [Bug 40029] - mod_proxy should interoperate with RPC over HTTP

2006-07-12 Thread bugzilla
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--- Additional Comments From [EMAIL PROTECTED]  2006-07-12 16:11 ---
So, there's no chance for be generous in what you accept? (Apache is already
strict in what it delivers)

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DO NOT REPLY [Bug 40029] - mod_proxy should interoperate with RPC over HTTP

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http://issues.apache.org/bugzilla/show_bug.cgi?id=40029





--- Additional Comments From [EMAIL PROTECTED]  2006-07-12 20:57 ---
Sorry, not in this case as this opens up a security hole if we are not strict 
here.

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