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Bug #9000 echo `cat /etc/passwd` -- bypasses open_basedir .
Submitted: 2001-01-30 07:47 UTC Modified: 2005-01-31 22:39 UTC
From: henka at isp dot org dot za Assigned:
Status: Closed Package: Safe Mode/open_basedir
PHP Version: 4.0.4pl1 OS: linux 2218
Private report: No CVE-ID: None
View Developer Edit
 [2001-01-30 07:47 UTC] henka at isp dot org dot za 
Even with open_basedir . configured in php.ini, the following bypasses it with concerning ease:

	echo `cat /etc/passwd`;

The fact that open_basedir is in force is obvious when we try fopen ("/etc/passwd", "r"), etc - ie, the expected open_basedir error pops up.

Surely this is not a bug?  If so, is there a way to disable backticks?

I'll wait for some kind of response before I send this to the usual support mailing lists.

Patches

123 (last revision 2013-05-05 04:24 UTC by 123321 at qq dot com)

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2001-02-03 18:25 UTC] david@php.net 
safe_mode disables ``
safe_mode_exec_dir specifies a base directory for executables
disable_functions allows you to turn disable certain functions completely
 
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