__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
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/ | /_\ /
\___ __|__ / \ \___
__________________________________________________________
INFORMATION BULLETIN
Vulnerability in DNS Client
[Microsoft Security Bulletin (MS08-020)]
April 9, 2008 19:00 GMT Number S-251
[REVISED 10 Apr 2008]
[REVISED 14 Apr 2008]
[REVISED 17 Apr 2008]
______________________________________________________________________________
PROBLEM: A spoofing vulnerability exists in Windows DNS clients. The
vulnerability could allow an unauthenticated attacker to send
malicious responses to DNS requests made by vulnerable clients,
thereby spoofing or redirecting Internet traffic from
legitimate locations.
PLATFORM: Microsoft Windows 2000 (all editions)
Windows XP (all editions)
Mmicrosoft Windows Server 2003 (all editions)
Windows Vista (all editions)
Storage Management Appliance (SMA) v2.1 Software running on
Storage Management Appliance I, II, III
DAMAGE: Could allow spoofing.
SOLUTION: Upgrade to the appropriate version.
______________________________________________________________________________
VULNERABILITY The risk is MEDIUM. Could allow an unauthenticated attacker to
ASSESSMENT: send malicious responses to DNS requests made by vulnerable
clients, thereby spoofing or redirecting Internet traffic from
legitimate locations.
______________________________________________________________________________
CVSS 2 BASE SCORE: 7.5
TEMPORAL SCORE: 6.2
VECTOR: (AV:N/AC:L/Au:N/C:P/I:P/A:P/E:F/RL:OF/RC:C)
______________________________________________________________________________
LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/s-251.shtml
ORIGINAL BULLETIN: http://www.microsoft.com/technet/security/Bulletin/MS08-020.mspx
ADDITIONAL LINK: Visit Hewlett-Packard's Subscription Service for:
HPSBST02329 SSRT080048 rev. 1
CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=
CVE-2008-0087
______________________________________________________________________________
REVISION HISTORY:
04/10/2008 - revised S-251 to reflect changes Microsoft has made in MS08-020 where
added Windows Vista x64 to the list of affected software inthe
Executive Summary.
04/14/2008 - revised S-251 to reflect changes Microsoft has made in MS08-020 where
updated FAQ to clarify the systems at risk and remove a reference to
unsupported software.
04/17/2008 - revised S-251 to add a link to Hewlett-Packard's Subscription Service for:
HPSBST02329 SSRT080048 rev. 1 for Storage Management Appliance (SMA) v2.1
Software running on Storage Management Appliance I, II, III.
[***** Start Microsoft Security Bulletin (MS08-020) *****]
Microsoft Security Bulletin MS08-020 – Important
Vulnerability in DNS Client Could Allow Spoofing (945553)
Published: April 8, 2008 | Updated: April 11, 2008
Version: 1.2
General Information
Executive Summary
This security update resolves a privately reported vulnerability. This spoofing
vulnerability exists in Windows DNS clients and could allow an attacker to send
specially crafted responses to DNS requests, thereby spoofing or redirecting
Internet traffic from legitimate locations.
This is an important security update for Windows Vista and Windows Vista x64
Editions, and all supported editions of Microsoft Windows 2000, Windows XP, and
Windows Server 2003. For more information, see the subsection, Affected and
Non-Affected Software, in this section.
This security update addresses the vulnerability by increasing the randomness
of DNS transaction IDs. For more information about the vulnerability, see the
Frequently Asked Questions (FAQ) subsection for the specific vulnerability
entry under the next section, Vulnerability Information.
Recommendation. Microsoft recommends that customers apply the update at the
earliest opportunity.
Known Issues. None
Top of section
Affected and Non-Affected Software
The software listed here have been tested to determine which versions or
editions are affected. Other versions or editions are either past their
support life cycle or are not affected. To determine the support life cycle
for your software version or edition, visit Microsoft Support Lifecycle.
Affected Software
Operating System Maximum Security Impact Aggregate Severity Rating Bulletins
Replaced by This Update
Microsoft Windows 2000 Service Pack 4
Spoofing
Important
None
Windows XP Service Pack 2
Spoofing
Important
None
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition
Service Pack 2
Spoofing
Important
None
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2
Spoofing
Important
None
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service
Pack 2
Spoofing
Important
None
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003
with SP2 for Itanium-based Systems
Spoofing
Important
None
Windows Vista
Spoofing
Important
None
Windows Vista x64 Edition
Spoofing
Important
None
Non-Affected Software
Operating System
Windows Vista Service Pack 1 (all editions)
Windows Server 2008 (all editions)
Vulnerability Information
Severity Ratings and Vulnerability Identifiers
Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software DNS Spoofing Attack Vulnerability – CVE-2008-0087 Aggregate
Severity Rating
Microsoft Windows 2000 Service Pack 4
Important
Spoofing
Important
Windows XP Service Pack 2
Important
Spoofing
Important
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition
Service Pack 2
Important
Spoofing
Important
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2
Important
Spoofing
Important
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service
Pack 2
Important
Spoofing
Important
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003
with SP2 for Itanium-based Systems
Important
Spoofing
Important
Windows Vista
Important
Spoofing
Important
Windows Vista x64 Edition
Important
Spoofing
Important
Top of section
DNS Spoofing Attack Vulnerability – CVE-2008-0087
A spoofing vulnerability exists in Windows DNS clients. The vulnerability could
allow an unauthenticated attacker to send malicious responses to DNS requests made
by vulnerable clients, thereby spoofing or redirecting Internet traffic from
legitimate locations.
To view this vulnerability as a standard entry in the Common Vulnerabilities and
Exposures list, see CVE-2008-0087.
Update Information
Detection and Deployment Tools and Guidance
Manage the software and security updates you need to deploy to the servers, desktop,
and mobile computers in your organization. For more information see the TechNet
Update Management Center. The Microsoft TechNet Security Web site provides
additional information about security in Microsoft products.
Security updates are available from Microsoft Update, Windows Update, and Office
Update. Security updates are also available from the Microsoft Download Center.
You can find them most easily by doing a keyword search for "security update."
Finally, security updates can be downloaded from the Microsoft Update Catalog. The
Microsoft Update Catalog provides a searchable catalog of content made available
through Windows Update and Microsoft Update, including security updates, drivers
and service packs. By searching using the security bulletin number (such as,
“MS07-036”), you can add all of the applicable updates to your basket (including
different languages for an update), and download to the folder of your choosing.
For more information about the Microsoft Update Catalog, see the Microsoft Update
Catalog FAQ.
Detection and Deployment Guidance
Microsoft has provided detection and deployment guidance for this month’s security
updates. This guidance will also help IT professionals understand how they can use
various tools to help deploy the security update, such as Windows Update, Microsoft
Update, Office Update, the Microsoft Baseline Security Analyzer (MBSA), the Office
Detection Tool, Microsoft Systems Management Server (SMS), and the Extended
Security Update Inventory Tool. For more information, see Microsoft Knowledge Base
Article 910723.
Microsoft Baseline Security Analyzer
Microsoft Baseline Security Analyzer (MBSA) allows administrators to scan local
and remote systems for missing security updates as well as common security
misconfigurations. For more information about MBSA, visit Microsoft Baseline
Security Analyzer.
The following table provides the MBSA detection summary for this security update.
Software MBSA 2.0.1
Microsoft Windows 2000 Server Service Pack 4
Yes
Windows XP Service Pack 2
Yes
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition
Service Pack 2
Yes
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2
Yes
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service
Pack 2
Yes
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003
with SP2 for Itanium-based Systems
Yes
Windows Vista
See Note for Windows Vista below
Windows Vista x64 Edition
See Note for Windows Vista below
Note for Windows Vista Microsoft does not support installing MBSA 2.0.1 on
computers that run Windows Vista, but you may install MBSA 2.0.1 on a supported
operating system and then scan the Windows Vista-based computer remotely. For
additional information about MBSA support for Windows Vista, visit the MBSA Web
site. See also Microsoft Knowledge Base Article 931943: Microsoft Baseline
Security Analyzer (MBSA) support for Windows Vista.
For more information about MBSA 2.0.1, see MBSA 2.0 Frequently Asked Questions.
Windows Server Update Services
By using Windows Server Update Services (WSUS), administrators can deploy the
latest critical updates and security updates for Windows 2000 operating systems
and later, Office XP and later, Exchange Server 2003, and SQL Server 2000 to
Windows 2000 and later operating systems. For more information about how to
deploy this security update using Windows Server Update Services, visit the
Windows Server Update Services Web site.
Systems Management Server
The following table provides the SMS detection and deployment summary for this
security update.
Product SMS 2.0 SMS 2003 with SUSFP SMS 2003 with ITMU SCCM 2007
Microsoft Windows 2000 Server Service Pack 4
Yes
Yes
Yes
Yes
Windows XP Service Pack 2
Yes
Yes
Yes
Yes
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service
Pack 2
No
No
Yes
Yes
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2
Yes
Yes
Yes
Yes
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2
No
No
Yes
Yes
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with
SP2 for Itanium-based Systems
No
No
Yes
Yes
Windows Vista
No
No
See Note for Windows Vista below
Yes
Windows Vista x64 Edition
No
No
See Note for Windows Vista below
Yes
For SMS 2.0 and SMS 2003, the SMS SUS Feature Pack (SUSFP), which includes the
Security Update Inventory Tool (SUIT), can be used by SMS to detect security updates.
See also Downloads for Systems Management Server 2.0.
For SMS 2003, the SMS 2003 Inventory Tool for Microsoft Updates (ITMU) can be used
by SMS to detect security updates that are offered by Microsoft Update and that are
supported by Windows Server Update Services. For more information about the SMS 2003
ITMU, see SMS 2003 Inventory Tool for Microsoft Updates. SMS 2003 can also use the
Microsoft Office Inventory Tool to detect required updates for Microsoft Office
applications. For more information about the Office Inventory Tool and other
scanning tools, see SMS 2003 Software Update Scanning Tools. See also Downloads for
Systems Management Server 2003.
Note for Windows Vista Microsoft Systems Management Server 2003 with Service Pack 3
includes support for Windows Vista manageability.
System Center Configuration Manager (SCCM) 2007 uses WSUS 3.0 for detection of
updates. For more information about SCCM 2007 Software Update Management, visit
System Center Configuration Manager 2007.
For more information about SMS, visit the SMS Web site.
For more detailed information, see Microsoft Knowledge Base Article 910723:
Summary list of monthly detection and deployment guidance articles.
Top of section
Security Update Deployment
Affected Software
For information about the specific security update for your affected software,
click the appropriate link:
* Microsoft Windows 2000 (all editions)
* Windows XP (all editions)
* Microsoft Windows Server 2003 (all editions)
* Windows Vista (all editions)
Other Information
Acknowledgments
Microsoft thanks the following for working with us to help protect customers:
• Amit Klein of Trusteer for reporting the DNS Spoofing Attack Vulnerability –
(CVE-2008-0087).
• Alla Berzroutchko of Scanit for reporting the DNS Spoofing Attack Vulnerability
– (CVE-2008-0087).
• Roy Arends of Nominet UK for reporting the DNS Spoofing Attack Vulnerability
– (CVE-2008-0087).
Top of section
Support
• Customers in the U.S. and Canada can receive technical support from Microsoft
Product Support Services at 1-866-PCSAFETY. There is no charge for support
calls that are associated with security updates.
• International customers can receive support from their local Microsoft
subsidiaries. There is no charge for support that is associated with security
updates. For more information about how to contact Microsoft for support
issues, visit the International Support Web site.
Top of section
Disclaimer
The information provided in the Microsoft Knowledge Base is provided
"as is" without warranty of any kind. Microsoft disclaims all warranties,
either express or implied, including the warranties of merchantability and
fitness for a particular purpose. In no event shall Microsoft Corporation
or its suppliers be liable for any damages whatsoever including direct,
indirect, incidental, consequential, loss of business profits or special
damages, even if Microsoft Corporation or its suppliers have been advised
of the possibility of such damages. Some states do not allow the exclusion
or limitation of liability for consequential or incidental damages so the
foregoing limitation may not apply.
Top of section
Revisions
• V1.0 (April 8, 2008): Bulletin published.
• V1.1 (April 9, 2008): Bulletin updated to add Windows Vista x64 Edition to
the list of affected software in the Executive Summary.
• V1.2 (April 11, 2008): Vulnerability FAQ updated to clarify the systems at
risk and remove a reference to unsupported software.
[***** End Microsoft Security Bulletin (MS08-020) *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Microsoft for the
information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
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