Bug #15187 Updated: PHP parses untrusted documents (or something like that ;P)

ID: 15187 Updated by: jan Reported By: tozz@kijkt.tv Old Status: Open Status: Bogus Bug Type: Scripting Engine problem Operating System: Linux 2.4 PHP Version: 4.1.1 New Comment: I call it a user error. no external sources are to be trusted with no error/security/integrity check. Previous Comments: ------------------------------------------------------------------------ [2002-01-23 15:30:20] tozz@kijkt.tv Hello, I think there is a pretty large security issue in PHP. E.g. we have 2 servers, we call server 1 'embrace', and name server 2 'kossy'. on embrace we create a file index.php: <? include("http://kossy/issue.php"); ?> on kossy we create a file issue.php: <? system($cmd); ?> well, if we now type: http://embrace/index.php?cmd=ls we see the 'ls' output from kossy. This is the way it should be.. BUT, when we disable PHP op kossy we get a rather nasty bug (imho). If we type http://embrace/index.php?cmd=ls again (where kossy has no PHP support) embrace includes the PHP source code from kossy and then parses the file, which will give us the 'ls' result on embrace. This can be used for numerous attacks. And I PHP should only include parsed PHP or non-PHP files from external (http://) links. Bye, Tozz ------------------------------------------------------------------------ Edit this bug report at http://bugs.php.net/?id=15187&edit=1