SquirrelMail 'compose.php' Lets Remote Authenticated Users Overwrite Variables
SecurityTracker Alert ID: 1016689|
SecurityTracker URL: http://securitytracker.com/id/1016689
(Links to External Site)
Date: Aug 12 2006
Disclosure of user information, Modification of user information|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): prior to 1.4.8|
A vulnerability was reported in SquirrelMail. A remote authenticated user can overwrite certain variables.|
A remote authenticated user can invoke 'compose.php' and specify arbitrary values for arbitrary parameters, regardless of the register_globals setting. This may allow the user to read or overwrite a target user's preference file or attachments.
The vendor credits James Bercegay of GulfTech Security Research with discovering this vulnerability.
A remote authenticated user may be able to read or overwrite a target user's preference file or attachments.|
The vendor has issued a fixed version (1.4.8), available at:|
Some patches are also available:
The Squirrelmail advisory is available at:
Vendor URL: www.squirrelmail.org/security/issue/2006-08-11 (Links to External Site)
Input validation error|
|Underlying OS: Linux (Any), UNIX (Any), Windows (Any)|
This archive entry has one or more follow-up message(s) listed below.|
Source Message Contents
Subject: SquirrelMail 1.4.8 released - fixes variable overwriting attack|
Today SquirrelMail version 1.4.8 has been released with a collection of
bugfixes and an important security fix. It was possible for an
authenticated user to overwrite random variables in the compose.php
script. This may open up possible attack vectors like reading or
overwriting a user's preference file or attachments.
We advise all current SquirrelMail users to upgrade. There's also a
patch available against 1.4.7. The interesting thing is that the
function that contained the flaw was actually broken. The function is
used to resume a compose session of a user that is confronted with a
session timeout after composing a long mail. We've got two patches
available: a minimal one which just removes the code, since it was
broken anyway, and a full version that repairs the functionality and
closes the hole.
SquirrelMail can be downloaded here:
The patches can be found here:
They also apply against the current development version.
We'd like to thank James Bercegay of GulfTech Security Research for
finding this issue and reporting it to us.
on behalf of the SquirrelMail team
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