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Date: Fri, 10 Jun 2016 13:56:14 -0400
From: Scott Arciszewski <scott@...agonie.com>
To: oss-security@...ts.openwall.com
Subject: Simple Machines Forums - PHP Object Injection
I reported the following PHP Object Injection vulnerabilities to the SMF
development team on March 9, 2016:
https://github.com/SimpleMachines/SMF2.1/blob/404fd5347951652624dfb72304ee38fcab98378f/Sources/Packages.php#L863-L873
https://github.com/SimpleMachines/SMF2.1/blob/19ee85ff8761b792ea3e9ed630a947f45f93ee68/Sources/LogInOut.php#L125-L129
In the first case, you can achieve PHP Object Injection by sending
themechanges[]=serialized+object+here in the POST data of an HTTP request.
It looks like someone had attempted to find+replace all the obvious PHP
Object Injection issues (i.e. unserialize($_POST['foo'])) at some point,
but they didn't look for variables directly derived from user input.
(foreach ($_POST['foo'] as $bar)).
I've sent follow-up emails to the development team but was never notified
of any progress towards fixing it.
The first one appears to have been fixed in the release-2.1 branch, but the
other one still exists.
https://github.com/SimpleMachines/SMF2.1/blob/release-2.1/Sources/Packages.php#L872-L882
is fixed
https://github.com/SimpleMachines/SMF2.1/blob/release-2.1/Sources/LogInOut.php#L125-L129
is unfixed
That's all from me.
Scott Arciszewski
Chief Development Officer
Paragon Initiative Enterprises <https://paragonie.com>
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