May 2011 - Posts

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Title: Microsoft Security Bulletin Minor Revisions
Issued: May 17, 2011
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Summary
=======
The following bulletins have undergone a minor revision increment.
Please see the appropriate bulletin for more details.

  * MS11-036 - Important

Bulletin Information:
=====================

* MS11-036 - Important

  - http://www.microsoft.com/technet/security/bulletin/ms11-036.mspx
  - Reason for Revision: V1.1 (May 17, 2011): Removed an erroneous
    note from the Affected Software table pertaining to security
    updates KB2535818 and KB2540162 for Microsoft PowerPoint 2007
    Service Pack 2. 
  - Originally posted: May 10, 2011
  - Updated: May 17, 2011
  - Bulletin Severity Rating: Important
  - Version: 1.1

********************************************************************

Title: Microsoft Security Bulletin Re-Releases

Issued: May 16, 2011

********************************************************************

 

Summary

=======

The following bulletins have undergone a major revision increment.

Please see the appropriate bulletin for more details.

 

  * MS11-018 - Critical

 

Bulletin Information:

=====================

 

* MS11-018 - Critical

 

 - http://www.microsoft.com/technet/security/bulletin/ms11-018.mspx

 - Reason for Revision: V2.0 (May 16, 2011): Bulletin rereleased to

    reoffer the update for Internet Explorer 7 on supported

    editions of Windows XP and Windows Server 2003. This is a

    detection change only. There were no changes to the binaries.

    Only affected customers will be offered the update. Customers

    who have installed the update manually and customers running

    configurations not targeted by the change to detection logic

    do not need to take any action. 

 - Originally posted: April 12, 2011

 - Updated: May 16, 2011

 - Bulletin Severity Rating: Critical

 - Version: 2.0

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Published: 2011-05-10,
Last Updated: 2011-05-10 16:58:08 UTC
by Swa Frantzen (Version: 1)
0 comment(s)

Overview of the May 2011 Microsoft patches and their status.

# Affected Contra Indications Known Exploits Microsoft rating ISC rating(*)
clients servers
MS11-035 An input validation vulnerability in WINS allow arbitrary code execution with the rights of the WINS system.
Note: WINS is not installed by default.
Replaces MS09-039.
WINS

CVE-2011-1248
KB 2524426 No known exploits Severity:Critical
Exploitability:2
N/A Critical
MS11-036 Memory corruption and buffer overflow vulnerabilities allow for arbitrary code execution with the rights of the logged on user.
Note: Microsoft confirms in the bulletin that Office for Mac versions 2004 and 2008 of Powerpoint are vulnerable, but no patch is available at this point in time, nor is there an indication of a time commitment.
Note: Windows Office 2010 and Office for Mac 2011 are not affected.
Replaces MS11-022.
Powerpoint

CVE-2011-1269
CVE-2011-1270
KB 2545814 No known exploits Severity:Important
Exploitability:1,3
Critical Important
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.

--
Swa Frantzen -- Section 66

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Published: 2011-05-06,
Last Updated: 2011-05-06 15:30:32 UTC
by Richard Porter (Version: 1)
0 comment(s)

We have received early notification that Microsoft is updating the method of guidance for patching. In 2008 Microsoft published its first Exploit Index to better guide customers on likelihood of getting "Sploited." This new notification reflects a change in the index ratings.

 

Microsoft Exploit Index
1 Consistent exploit code likely
2 Inconsistent exploit code likely
3 Functioning exploit code unlikely

 

Reviewing the publication by Microsoft, I think they are saying:

1 - Code easy to create and or already created.
2 - Moderate to create or maybe a DoS and or that results are not consistent.
3 - They don't feel the risk is high.

As always, the Storm Center Handlers will continue to independently evaluate "Microsoft Patch Tuesday" for "Reboot Wednesday" and provide our guidance :) On their site, if you recall MS08-021 (Vulnerability in GDI Could (Did and does :) Allow Remote Code Execution)? MSFT rates that with an EIA of 1.

Also, in the notification they included early warning of a light patch month that includes a set of Office patches and 2003-2008 R2 set of server patches.

Finally, MSFT will be aggregating their Index into Current Software and older software.

"As of this month, we are making some changes to the rating system to make vulnerability assessment more clear and digestible for customers. Specifically, we will be publishing two Exploit-ability Index ratings per vulnerability- one for the most recent platform, the other as an aggregate rating for all older versions of the software. " -- technet.microsoft.com

 

Check out:

http : // technet.microsoft.com/en-us/security/cc998259.aspx  <-- Index Definition

http : // tinyurl.com/6fygchn <-- Original Notice

http : / /www.microsoft.com/technet/security/bulletin/ms11-may.mspx  <-- Advanced Notice

 

Richard Porter

--- ISC Handler on Duty