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Bug #11322 Security hole in multiuser environment
Submitted: 2001-06-06 16:28 UTC Modified: 2005-01-31 22:44 UTC
From: wangshui at nyist dot net Assigned:
Status: Not a bug Package: Safe Mode/open_basedir
PHP Version: 4.0.4pl1 OS: Linux
Private report: No CVE-ID: None
 [2001-06-06 16:28 UTC] wangshui at nyist dot net
I'm a chinese user, and I give thousands of students websites with PHP-enabled within ONE machine. I found that:

There ARE some security holes in multiuser environment for PHP concerning file system functions and directory funtions:

1.file-system functions such as 'fopen' are restricted by 'safe mode' and 'open_basedir', but 'copy' only checks the 'source' argument, not the 'destination', so one can copy his own scripts to someone else' directory and bypass the 'open_basedir' restriction.

2.'dir' class is not restricted by 'safe mode' or 'open_basedir'!!!

3.'chdir' is dangerous. one user can 'chdir' to another user's directory and access the files.


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 [2001-09-07 11:33 UTC]
It looks like the 'copy' command has been patched to check source and destination in CVS.
 [2002-06-02 13:39 UTC]
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