Security: statusmessages and linkintegrity unsafe network data hotfix (CVE-2007-5741)

A vulnerability in both the statusmessages and linkintegrity modules  
has been identified, where untrusted network data was treated as a  
pickle and loaded. This allows an attacker to run arbitrary python  
code within the Zope/Plone process.

This issue has been assigned CVE-2007-5741

Affected versions
-----------------

This hotfix applies to Plone 2.5 up to and including 2.5.4, and Plone  
3.0 up
to and including 3.0.2.

These fixes will be included in the upcoming 2.5.5 and 3.0.3 releases,  
at
which point this hotfix can be removed.

Earlier plone releases (versions 2.1.x and below) are not affected.

Plone Hotfix 2007-11-06
-----------------------

A hotfix that addresses this vulnerability can be downloaded at:

  http://plone.org/products/plone-hotfix/releases/20071106

The hotfix should be installed as soon as possible. To install, simply  
extract the archive into your Zope/Plone products directory and  
restart the server.

Martijn Pieters
The Plone Security Response Team


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