Today is the second Tuesday of the month, so it’s once again time for Microsoft security patches. This month, Microsoft is releasing eight security bulletins, addressing 22 identified vulnerabilities. Two of the bulletins have a maximum severity rating of Critical; the others are rated Important. Five of the bulletins are for Windows itself, one affects the .NET framework and Silverlight, one the Host Integration Sever, and one the Forefront Unified Access Gateway. All supported versions of Windows are affected, and each has at least one Critical patch. (A breakdown of patch severity by version is in this month’s preview post.) Full details, and download links,are in Microsoft’s Security Bulletin Summary for October 2011.
According to Microsoft, four of the patches will definitely require a system restart, and the others may require one, depending on your system’s configuration. As usual, I recommend that you update your systems as soon as you conveniently can.
As always, the folks at the SANS Internet Storm Center have posted a diary entry with their assessment of this month’s patches and their severity.
Update Tuesday, 11 October, 22:59 EDT
I should have mentioned that the security bulletin [MS11-78] for Silverlight also affects Silverlight installed on Mac OS X.