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Bug #45947 Apache env variables changed by PHP IN Apache
Submitted: 2008-08-29 13:37 UTC Modified: 2008-08-30 16:45 UTC
From: regis dot leroy at makina-corpus dot com Assigned:
Status: Closed Package: Apache2 related
PHP Version: 5.2.6 OS: Linux Debian
Private report: No CVE-ID: None
 [2008-08-29 13:37 UTC] regis dot leroy at makina-corpus dot com
reopening Bug #39927 and Bug #13961 which seems to have been marked Bogus because of a Bogus reviewer.
Apache Env set by, for example:
 BrowserMatch "MSIE 4\.0b2;" nokeepalive downgrade-1.0 force-response-1.0

Is treaten in PHP to become downgrade-1_0 with an "_". that's OK, its' for security reasons.
But it is changed in Apache, and so Apache will not modify the response to make his 'forced downgrade to HTTP/1.0'.
This breaks Apache mechanism to handle bad browser which do not understand well HTTP/1.1 (with chunked responses on bad Java soap parses for exemple).

I reedit the bug to give a workaround for people interested:
in PHP write such things:
if ($_SERVER['downgrade-1_0']){
Beware of safe mode allowed env vars if you're in safe mode.

Now you have to right behaviour $_SERVER contains only strings without dots but Apache have the right env to behave well.

Shame on PHP....

Reproduce code:
see previous bugs

Expected result:
response in HTTP/1.0

Actual result:
response in HTTP/1.1


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 [2008-08-30 16:45 UTC]
I don't think this one is bogus.  Ilia was wrong in 13961.  Only the value is copied, not the key there.  And in 39927 I replied to the last commenter who seemed to want to disable the . -> _ munging when register_globals is off, but missed the original point of the code modifying the passed in key.  We dropped the ball multiple times on this one.

I'll commit a fix in a bit.

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