May 2008 black tuesday overview

Published: 2008-05-13
Last Updated: 2008-05-13 22:01:08 UTC
by Swa Frantzen (Version: 1)
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Overview of the May 2008 Microsoft patches and their status.

# Affected Contra Indications Known Exploits Microsoft rating ISC rating(*)
clients servers
MS08-026 Multiple vulnerabilities allow code execution when opening a malicious file. Files opened with word and edited with word in outlook are of particular concern.
Replaces MS08-009.

KB 951207 No publicly known exploits Critical Critical Important
MS08-027 The fixed vulnerability is an input validation failure leading to memory corruption and code execution.
Replaces MS08-012 and MS07-037.

KB 951208
No publicly known exploits Critical Critical Important
MS08-028 The fixed vulnerability is an input validation failure leading to a buffer overflow and allowing code execution.
Jet database engine

KB 950749

SA 950627
Actively exploited Critical PATCH NOW Important

Microsoft onecare, antigen, defender and forefront use the malware protection engine. It suffers from multiple input validation failures leading to a Denial of Service.

Microsoft malware protection engine


KB 952044
No publicly known exploits Moderate Less Urgent Important


We will update issues on this page 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 -- Gorilla Security

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