[UNIX] Clever Copy Privileges Escalation Vulnerability

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To: list@securiteam.com
Date: 2 Aug 2005 17:49:11 +0200

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  Clever Copy Privileges Escalation Vulnerability
------------------------------------------------------------------------

SUMMARY

" <http://clevercopy.bestdirectbuy.com/> Clever Copy is a free, fully
scalable web site portal and news posting system." Clever Copy contains a
flaw that allows a Unauthorized read & delete Private Messages from other
users.

DETAILS

Vulnerable Systems:
 * Clever Copy version 2.0
 * Clever Copy version 2.0a

Authenticated users can directly access a page that will allow them access
a private message of other users, in addition to being able to either read
or delete these messages like they were their own.

Proof of Concept:
In order to access private messages we first need to be logged on. He can
they go to the following addresses:
http://[victim]/readpm.php?op=read&ID=2&name=pruebas&user=waltrapass
or
http://[victim]/readpm.php?op=read&ID=2&user=waltrapass

Which will allow him to look at message ID 2 of the user waltrapass.

In the above URL you can modify parameters to any of the following values:
op = read or del
id = id of the message
name = username that sent the private message (this is not necessary to
view or delete a message)
user = username the user that received the message

For example, to delete a message a URL such as this needs to be provided:
http://[victim]/readpm.php?op=del&ID=2&name=pruebas&user=waltrapass
or
http://[victim]/readpm.php?op=del&ID=2&user=waltrapass

Disclosure Timeline:
Discovered: 25-07-2005
Vendor notify: 26-07-2005
Disclosure: 27-07-2005

ADDITIONAL INFORMATION

The information has been provided by <mailto:lostmon@gmail.com> Lostmon.
The original article can be found at:
<http://lostmon.blogspot.com/2005/07/clever-copy-unauthorized-read-delete.html> http://lostmon.blogspot.com/2005/07/clever-copy-unauthorized-read-delete.html

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