Microsoft March 2013 Black Tuesday Overview

Published: 2013-03-12
Last Updated: 2013-03-13 08:48:46 UTC
by Swa Frantzen (Version: 1)
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Overview of the March 2013 Microsoft patches and their status.

# Affected Contra Indications - KB Known Exploits Microsoft rating(**) ISC rating(*)
clients servers
MS13-021 The usual MSIE cumulative patch, adding fixes for eight more vulnerabilities. All 8 are of the "use after free" type and they all allow random code execution.  
Replaces MS13-009.
KB 2809289 CVE-2013-1288 was made public according to Microsoft. Severity:Critical
Critical Important
MS13-022 A double dereference vulnerability that allows random code execution in Silverlight.
This also affects the mac version of silverlight 5. The update is expected via the auto-update feature on Macs.
Replaces MS12-034.

KB 2814124 No publicly known exploits Severity:Critical
Critical Important
MS13-023 A memory management vulnerability allow random code execution in the Visio viewer. The full package is exempt from this problem. 
Replaces MS12-059.
Visio Viewer

KB 2801261 No publicly known exploits Severity:Critical
Critical Important
MS13-024 Four different privilege escalation vulnerabilities in Sharepoint. Of note: it includes an XSS and a directory traversal vulnerability in addition to a problem with callback functions and a buffer overflow.
Replaces MS12-066.

KB 2780176 No publicly known exploits. Severity:Critical
N/A Critical
MS13-025 A buffer management problem allows leaking arbitrary data in memory. It could expose usernames and passwords of accounts.

KB 2816264 No publicly known exploits. Severity:Important
Important Less Urgent
MS13-026 When previewing or opening an email that contain HTML5, outlook for Mac can load content from random webservers without user interaction.
The note is quite confusing. E.g.: every mac capable of running the affected versions has a webkit browser installed together with the OS; Office for Mac 2008 did not have outlook - it had entourage instead; Outlook isn't part of all Office for Mac 2011 licenses either. 
Replaces MS12-076.
Outlook for Mac

KB 2813682 No publicly known exploits Severity:Important
Less Urgent Less Urgent
MS13-027 3 similar problems exist with the windows USB drivers that allow privilege escalation to full administrative rights.  
USB Kernel Mode Drivers

KB 2807986 No publicly known exploits Severity:Important
Important Less Urgent
We will update issues on this page for about a week or so as they evolve.
We appreciate updates
US based customers can call Microsoft for free patch related support on 1-866-PCSAFETY
(*): ISC rating
  • We use 4 levels:
    • PATCH NOW: Typically used where we see immediate danger of exploitation. Typical environments will want to deploy these patches ASAP. Workarounds are typically not accepted by users or are not possible. This rating is often used when typical deployments make it vulnerable and exploits are being used or easy to obtain or make.
    • Critical: Anything that needs little to become "interesting" for the dark side. Best approach is to test and deploy ASAP. Workarounds can give more time to test.
    • Important: Things where more testing and other measures can help.
    • Less Urgent: Typically we expect the impact if left unpatched to be not that big a deal in the short term. Do not forget them however.
  • The difference between the client and server rating is based on how you use the affected machine. We take into account the typical client and server deployment in the usage of the machine and the common measures people typically have in place already. Measures we presume are simple best practices for servers such as not using outlook, MSIE, word etc. to do traditional office or leisure work.
  • The rating is not a risk analysis as such. It is a rating of importance of the vulnerability and the perceived or even predicted threat for affected systems. The rating does not account for the number of affected systems there are. It is for an affected system in a typical worst-case role.
  • Only the organization itself is in a position to do a full risk analysis involving the presence (or lack of) affected systems, the actually implemented measures, the impact on their operation and the value of the assets involved.
  • All patches released by a vendor are important enough to have a close look if you use the affected systems. There is little incentive for vendors to publicize patches that do not have some form of risk to them.

(**): The exploitability rating we show is the worst of them all due to the too large number of ratings Microsoft assigns to some of the patches.

Swa Frantzen -- Section 66

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