The following security advisory is sent to the securiteam mailing list, and can be found at the Secur
iTeam web site: http://www.securiteam.com
- - promotion

Beyond Security in Canada

Toronto-based Sunrays Technologies is now Beyond Security's representative in Canada.
We welcome ISPs, system integrators and IT systems resellers
to promote the most advanced vulnerability assessment solutions today.

Contact us at 416-482-0038 or at canadasales@beyondsecurity.com

- - - - - - - - -



  IMP Allows Arbitrary File Reading and Path Disclosure
------------------------------------------------------------------------


SUMMARY

 <http://www.horde.org> IMP (Internet Messaging Program) is a popular 
application, written in PHP which provides WebMail access to any IMAP or 
POP3 mailbox, and handles Internet standard MIME attachments, user defined 
filters, preferences, and more. A vulnerability in the product allows both 
arbitrary file reading and path disclosure vulnerabilities.

DETAILS

Elia Florio has found a security bug in the CSS manipulation page 
(index.php) of IMP, inside the admin section of the web-interface. If an 
user uses this page:
http://www.somesite.com/horde/admin/css/index.php

He can select the best CSS (cascade style-sheet) for IMP pages, using a 
special StyleSheet Editor, written in PHP. In the standard installation of 
IMP there are some CSS files showed in a ListBox of the page "index.php".
  ../../config/html.php
  ../../imp/config/html.php
  ../../turba/config/html.php

Selection of the CSS file is generated by the PHP page using a simple 
<select> tag, which refers the chosen style-sheet using the syntax:
"index.php?file=". <select name="file" 
onChange="self.location='index.php?file='+this.options[this.selectedIndex].value">

When an attacker provides a different file path to "index.php" page, it's 
possible to read any arbitrary file of the server, with the only 
limitation of web-server read permissions (enough to read /etc/passwd).

Instead, if an attacker provides a filename which not exists, the 
application will return some information about path of IMP and Apache on 
the server, like this:
Warning: Failed opening 'x' for inclusion
(include_path='/usr/local/apache/php:.') in 
/var/data/horde/horde/admin/css/index.php on line 78

Exploit:
Using a lot of "../" in file path, it's possible to get off from web-root 
and read any file in the server. This is typical attack URL used to read 
passwd file of server:
http://www.somesite.com/horde/admin/css/index.php?file=../../../../../../../../../etc/passwd

Using a non-existent filename, in this way, it's possible to exploit the 
path disclosure problem:
http://www.somesite.com/horde/admin/css/index.php?file=xxyyzz


ADDITIONAL INFORMATION

The information has been provided by  <mailto:eflorio@edmaster.it> Elia 
Florio.



======================================== 


This bulletin is sent to members of the SecuriTeam mailing list. 
To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@secu
riteam.com 
In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.co
m 


==================== 
==================== 

DISCLAIMER: 
The information in this bulletin is provided "AS IS" without warranty of any kind. 
In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, con
sequential, loss of business
 profits or special damages.