Threat Level: green Handler on Duty: Didier Stevens

SANS ISC: Microsoft Patch Tuesday Microsoft Patch Tuesday

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Microsoft Patch Tuesday 2011-05-10

Title 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 MS90-39
Affected WINS
KB KB2524426
Known Exploits No
Microsoft Rating Critical
ISC Client Rating N/A
ISC Server Rating N/A
CVE Exploitability
2011-1248 2
Title 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
Replaces MS11-022
Affected Powerpoint
KB KB2545814
Known Exploits No
Microsoft Rating Important
ISC Client Rating Critical
ISC Server Rating Critical
CVE Exploitability
2011-1269 1
2011-1270 3
We will update issues on this page for about a week or so as they evolve. We appreciate your 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: 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 threatatches.