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Bug #7044 Session file created when using bogus SESSIONID
Submitted: 2000-10-05 17:27 UTC Modified: 2000-10-16 14:18 UTC
From: kimmel at tricos dot com Assigned:
Status: Closed Package: Session related
PHP Version: 4.0.2 OS: Windows NT 4 Workstation
Private report: No CVE-ID: None
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From: kimmel at tricos dot com
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 [2000-10-05 17:27 UTC] kimmel at tricos dot com 
I'm using the <?=SID?> feature to automatically append the corresponding session ID to every link, so that no cookies are required to use the site.

A sample URL as visible on the browser?s address bar:
http://webtest/human_resources.phtml?SESSIONID=cca7f03abde2c33077df25999850d6dc

Now if I change the SESSIONID parameter to something really stupid PHP simply creates a file with exactly that name regardless if a session with that SESSIONID has never been created before by session_start():

http://webtest/human_resources.phtml?SESSIONID=stupidsessionid

creates the file "sessstupidsessionid" in the session directory.

Why?
This way someone could fill up the whole directory!

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 [2000-10-05 19:28 UTC] kimmel at tricos dot com 
JFYI: I'm using IIS/PWS (SP5) with the PHP CGI version.
 [2000-10-05 20:20 UTC] kimmel at tricos dot com 
JFYI: I'm using IIS/PWS (SP5) with the PHP CGI version.
 [2000-10-16 14:18 UTC] sas@php.net 
That is comparable to having many visitors to your site.
 
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