Microsoft April 2010 Patch Tuesday

Update 2

Looks like Don's issue relates to old, old versions of software

Update

Don reported the following:

"I had a problem with MS0-020 (KB980232) and had to uninstall it. --snip--"

Overview of the April 2010 Microsoft Patches and their status.

#	Affected	Contra Indications	Known Exploits	Microsoft rating	ISC rating(*)
#	Affected	Contra Indications	Known Exploits	Microsoft rating	clients	servers
MS10-019	Vulnerabilities in Windows Authenticode Verification
MS10-019	Authenticode CVE-2010-0486 CVE-2010-0487	KB 981210	no known exploits.	Severity:Critical Exploitability: 2,2	Critical	Critical
MS10-020	Vulnerabilities in SMB Client (Replaces MS10-006 )
MS10-020	SMB Client CVE-2009-3676 CVE-2010-0269 CVE-2010-0270 CVE-2010-0476 CVE-2010-0477	KB 980232	vuln public.	Severity:Critical Exploitability: 3,3,2,2,3	Critical	Critical
MS10-021	Privilege Elevation Vulnerabilities in Windows Kernel (Replaces MS10-015 )
MS10-021	Windows Kernel CVE-2010-0234 CVE-2010-0235 CVE-2010-0236 CVE-2010-0237 CVE-2010-0238 CVE-2010-0481 CVE-2010-0482 CVE-2010-0810	KB 979683	no known exploits.	Severity:Important Exploitability: ?,?,1,1,?,?,?,?	Important	Important
MS10-022	Vulnerability in VBScript Engine
MS10-022	VBScript CVE-2010-0483	KB 981169	Known Exploits!.	Severity:Critical Exploitability: 1	PATCH NOW!	Critical
MS10-023	Vulnerability in Microsoft Office Publisher (Replaces MS08-027 MS09-030 )
MS10-023	Publisher CVE-2010-0479	KB 981160	no known exploits.	Severity:Important Exploitability: 1	Critical	Important
MS10-024	DoS Vulnerability in Microsoft Exchange and SMTP Service
MS10-024	Exchange, SMTP Service CVE-2010-0024 CVE-2010-0025	KB 981832	vuln public.	Severity:Important Exploitability: 3,?	Moderate	Important
MS10-025	Vulnerability in Micorsoft Windows Media Services
MS10-025	Windows Meida Services CVE-2010-0478	KB 980858	no known exploit.	Severity:Critical Exploitability: 1	Moderate	Critical
MS10-026	Vulnerability in Microsoft MPEG Layer 3 Codec
MS10-026	MPEG Layer 3 Codec CVE-2010-0480	KB 977816	no known exploit.	Severity:Critical Exploitability: 1	Critical	Moderate
MS10-027	Vulnerability in Windows Media Player (Replaces MS07-047 )
MS10-027	Windows Media Player CVE-2010-0268	KB 979402	no known exploit.	Severity:Critical Exploitability: 1	Critical	Moderate
MS10-028	Vulnerabilities in Microsoft Visio (Replaces MS09-062 MS09-005 )
MS10-028	Windows Media Player CVE-2010-0254 CVE-2010-0256	KB 980094	no known exploit.	Severity:Critical Exploitability: 1,2	Critical	Important
MS10-029	ISATAP Spoofing Vulnerability
MS10-029	ISATAP CVE-2010-0812	KB 978338	no known exploit.	Severity:Moderate Exploitability: ?	Moderate	Moderate

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

------
Johannes B. Ullrich, Ph.D.
SANS Technology Institute
Twitter

Johannes

3915 Posts
ISC Handler

Apr 13th 2010

Shouldn't CVE-2009-0487 be CVE-2010-0487 or something?

Anonymous

There is a known issue for MS10-022 for systems that have had Windows Script Host 5.6 manually installed that rapid installers should consider:
http://support.microsoft.com/default.aspx?scid=kb;en-us;981349

Anonymous

Can you explain why your Client ratings for MS10-023 and MS10-028 are critical but Microsoft classifies them as Important?

http://www.microsoft.com/technet/security/Bulletin/MS10-023.mspx

http://www.microsoft.com/technet/security/Bulletin/MS10-028.mspx

Under the FAQ for MS10-028 it indicates -
Microsoft Office Visio 2002 and later versions have a built-in feature that prompts a user to Open, Save, or Cancel before opening a document. This mitigating factor reduces the remote code execution vulnerability from Critical to Important because the vulnerability requires more than a single user action to complete the exploit.

TexISO

19 Posts

You indicate that MS10-022 is a replacement for MS10-022. Humm... Endless loop, recursive call...

Which one, if any, does MS10-022 really replaces?

Anonymous

@Matt, @Francois - Fixed, Thanks!

Mark

391 Posts
ISC Handler

@Chuck. I guess because we disagree with Microsoft on this. We see a lot of document based attacks. And it is remote code execution.

In pentests we sometimes get the fun of playing with client side attacks using PDFs, so far it has successfully worked in every one.

Users will click OK if it gets them what they think they want. So to me saying that the risk is reduced because the user has to open it is relying on the weakest control ever, the user. True it is slightly less risky that a fully automated exploit, but this will be used in targeted attacks.

Mark

391 Posts
ISC Handler

@Chuck (in addition to Mark's comment): in http://blogs.technet.com/srd/archive/2010/04/12/assessing-the-risk-of-the-april-security-bulletins.aspx , Microsoft assigns an exploitability index of 1 to both MS10-023 (Publisher) and MS10-028 (Visio).

According to http://technet.microsoft.com/en-us/security/cc998259.aspx an exploitability index of 1 is the highest possible.

Some social engineering is required for these attacks, but as can be seen in a recent PDF attack often this is not hard (even with typos), see http://www.sophos.com/blogs/sophoslabs/?p=9308

Erik van Straten

126 Posts