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Bug #40761 header() is wrongly handled, thus causing problems for browsers
Submitted: 2007-03-08 20:43 UTC Modified: 2007-03-09 14:30 UTC
From: c dot kirschnick at gmx dot net Assigned: mike (profile)
Status: Not a bug Package: CGI/CLI related
PHP Version: 4.4.5 OS: *
Private report: No CVE-ID: None
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 [2007-03-08 20:43 UTC] c dot kirschnick at gmx dot net
Description:
------------
This bug was sent in before, but marked wrong "bogus"/"won't fix". (See Bug #38369). 

PHP does not correctly handle calls such as header("Status: ..."). In
CGI mode it should process such a call as a changing the HTTP response
code (consistent with its handling of, e.g., header("Location: ...")).
However, at present there is no special handling of the Status: header.
That's why sending Status: and then Location: causes a duplicate header:
the Location: header is handled as a special case and causes
sapi_update_response_code(302) to be called, whereas the Status: header
is just added to the list of headers to be sent back to the web server
(see bug #33225 incorrectly marked "bogus", I think because the reviewer
doesn't understand CGI). Note that sending two different Status: headers
explicitly with header("Status: ...") doesn't give this error, because
the default operation is to *replace* the header, not add a new one.

Since PHP should conform to the CGI-norm, this bug should be fixed. Although the IE does not fully stick to this norm, the FF does - which  ignores duplicated headers, resulting in different behaviour of both.

Reproduce code:
---------------
<?
header("HTTP/1.1 403 Forbidden");
?>

Expected result:
----------------
An error message created by the browser

Actual result:
--------------
IE: correct 403
FF: blank page (no output)


The headers:
HTTP/1.1 200 OK
HTTP/1.1 403 Forbidden

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 [2007-03-09 11:14 UTC] mike@php.net
Please tell me your server software and your configure line.

Cannot reproduce with 4.4.3 and 4.4-CVS:
mike@honeybadger:~/build/php-4.4-cgi-http$ cgi <<<'<?php header("HTTP/1.1 403 Forbidden");'
Status: 403
X-Powered-By: PHP/4.4.7-dev
Content-type: text/html


As you write

HTTP/1.1 200 OK
HTTP/1.1 403 Forbidden

as seen result, I think your server software exhibits this bug.
 [2007-03-09 14:24 UTC] c dot kirschnick at gmx dot net
Hum, tried it again and again - came to the conclusion that it was a browser issue.

Sorry, and keep up the good work.
 
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