Threat Level: green Handler on Duty: Rick Wanner

SANS ISC: Microsoft Patch Tuesday - April 2015 - Internet Security | DShield SANS ISC InfoSec Forums


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Microsoft Patch Tuesday - April 2015

Overview of the April 2015 Microsoft patches and their status.

# Affected Contra Indications - KB Known Exploits Microsoft rating(**) ISC rating(*)
clients servers
MS15-032 Cumulative Security Update for Internet Explorer
(ReplacesMS15-018 )
CVE-2015-1652, CVE-2015-1657, CVE-2015-1659, CVE-2015-1660, CVE-2015-1661, CVE-2015-1662, CVE-2015-1665, CVE-2015-1666, CVE-2015-1667, CVE-2015-1668 KB 3038314 No Severity:Critical
Exploitability:
Critical Important
MS15-033 Vulnerabilities in Microsoft Office Could Allow Remote Code Execution
(ReplacesMS14-081 MS15-022 )
CVE-2015-1639
CVE-2015-1641
CVE-2015-1649
CVE-2015-1650
CVE-2015-1651
KB 3048019 vuln. public. Severity:Critical
Exploitability:
Critical Important
MS15-034 Vulnerability in HTTP.sys Could Allow Remote Code Execution
CVE-2015-1635 KB 3042553 No Severity:Critical
Exploitability:
Critical Critical
MS15-035 Vulnerability in Microsoft Graphics Component Could Allow Remote Code Execution
CVE-2015-1645 KB 3046306 No Severity:Critical
Exploitability:
Critical Critical
MS15-036 Vulnerabilities in Microsoft SharePoint Server Could Allow Elevation of Privilege
(ReplacesMS15-022 )
CVE-2015-1640
CVE-2015-1653
KB 3052044 No Severity:Important
Exploitability:
N/A Important
MS15-037 Vulnerability in Windows Task Scheduler Could Allow Elevation of Privilege
CVE-2015-0098 KB 3046269 No Severity:Important
Exploitability:
Important Important
MS15-038 Vulnerabilities in Microsoft Windows Could Allow Elevation of Privilege
(ReplacesMS15-025 MS15-031 )
CVE-2015-1643
CVE-2015-1644
KB 3049576 No Severity:Important
Exploitability:
Important Important
MS15-039 Vulnerability in XML Core Services Could Allow Security Feature Bypass
(ReplacesMS14-067 )
CVE-2015-1646 KB 3046482 No Severity:Important
Exploitability:
Important Important
MS15-040 Vulnerability in Active Directory Federation Services Could Allow Information Disclosure
CVE-2015-1638 KB 3045711 No Severity:Important
Exploitability:
Important Important
MS15-041 Vulnerability in .NET Framework Could Allow Information Disclosure
(ReplacesMS14-009 )
CVE-2015-1648 KB 3048010 No Severity:Important
Exploitability:
Important Important
MS15-042 Vulnerability in Windows Hyper-V Could Allow Denial of Service
CVE-2015-1647 KB 3047234 No Severity:Important
Exploitability:
Important 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 Urt 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.

       

-- 
Alex Stanford - GIAC GWEB & GSEC,
Research Operations Manager,
SANS Internet Storm Center
/in/alexstanford

Alex Stanford

136 Posts
I find it interesting that in MS15-042 you can run a program inside a VM that has impact on the hypervisor outside of that VM. Oops. /me steers clear of hyper-v.
Anonymous
Our WSUS server will not download KB2553428 because it is tagged with various supported languages, but English is missing from the list. From the public MS update servers, the update comes down to a client just fine. It looks like MS needs to fix this language supported field so that company WSUS servers will actually get the update. Companies remain vulnerable to this issue and most likely don't know it.

Is anyone else seeing this issue?
mobartz

4 Posts
damn, MS15-034 for IIS sounds very serious

http://www.exploit-db.com/exploits/36773/
TuggDougins

37 Posts
Our WSUS server will not download KB2553428 because it is tagged with various supported languages, but English is missing from the list. From the public MS update servers, the update comes down to a client just fine. It looks like MS needs to fix this language supported field so that company WSUS servers will actually get the update. Companies remain vulnerable to this issue and most likely don't know it.

Is anyone else seeing this issue?
mobartz

4 Posts
Would it be a good idea to upgrade MS15-034 to "PATCH NOW"?
It seems exploits are being prepared.
What are you seeing?
mobartz
4 Posts
There is now a thread on the technet forums about this, and some others are starting to notice that they are NOT deploying this patch to their clients. You may not realize that KB2553428 is not being installed on your systems!

https://social.technet.microsoft.com/Forums/windowsserver/en-US/da85df07-18d5-42bd-ae7e-9aaad9f72fcb/kb2553428-not-showing-with-english-support-
from-wsus-server?forum=winserverwsus
mobartz

4 Posts
Quoting Anonymous:I find it interesting that in MS15-042 you can run a program inside a VM that has impact on the hypervisor outside of that VM. Oops. /me steers clear of hyper-v.


Maybe I'm missing something, but it doesn't seem to impact the actual hypervisor, but sounds from the description like it makes the management tool puke. E.g. something along the lines of "OhNoThisVMisDoingSomethingWeirdOhNoThisVMisDoingSomethingWeird..." ad infinitum.
Jaybone

27 Posts
We saw that KB2553428 had its language field changed to "all" recently, and now our WSUS server is allowing this to be deployed.
mobartz

4 Posts

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