__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
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__________________________________________________________
INFORMATION BULLETIN
Vulnerability in SNMP (926247)
[Microsoft Security Bulletin (MS06-074)]
December 13, 2006 13:00 GMT Number R-073
[REVISED 21 Dec 2006]
______________________________________________________________________________
PROBLEM: A remote code execution vulnerability exists in SNMP Service.
PLATFORM: Tested Software and Security Update Download Locations:
Affected Software:
• Microsoft Windows 2000 Service Pack 4
• Microsoft Windows XP Service Pack 2
• Microsoft Windows XP Professional x64 Edition
• Microsoft Windows Server 2003 and Microsoft Windows Server
2003 Service Pack 1
• Microsoft Windows Server 2003 for Itanium-based Systems and
Microsoft Windows Server 2003 with SP1 for Itanium-based
Systems
• Microsoft Windows Server 2003 x64 Edition
Non-Affected Software:
• Windows Vista
Storage Management Appliance I, II, III
DAMAGE: A remote intruder who could access the SNMP port on a system
could take complete control of the system. The SNMP Service is
not enabled by default.
SOLUTION: Upgrade to the appropriate version.
______________________________________________________________________________
VULNERABILITY The risk is HIGH. A remote intruder who could access the SNMP
ASSESSMENT: port on a system could take complete control of the system. The
SNMP Service is not enabled by default.
______________________________________________________________________________
LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-073.shtml
ORIGINAL BULLETIN: Microsoft Security Bulletin MS06-074 (926247)
http://www.microsoft.com/technet/security/Bulletin/
MS06-074.mspx
ADDITIONAL LINK: Visit Hewlett-Packard's Subscription Service for:
HPSBST02180 SSRT061288 rev. 1
CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=
CVE-2006-5583
______________________________________________________________________________
REVISION HISTORY:
12/21/2006 - revised to add a link to Hewlett-Packard HPSBST02180 SSRT061288
rev. 1 for Storage Management Appliance v2.1 Software running on
Storage Management Appliance I, II, III.
[***** Start Microsoft Security Bulletin (MS06-074) *****]
Microsoft Security Bulletin MS06-074
Vulnerability in SNMP Could Allow Remote Code Execution (926247)
Published: December 12, 2006
Version: 1.0
Summary
Who Should Read this Document: Customers who use Microsoft Windows
Impact of Vulnerability: Remote Code Execution
Maximum Severity Rating: Important
Recommendation: Customers should apply the update at the earliest opportunity
Security Update Replacement: None
Caveats: None
Tested Software and Security Update Download Locations:
Affected Software:
• Microsoft Windows 2000 Service Pack 4 — Download the update
• Microsoft Windows XP Service Pack 2 — Download the update
• Microsoft Windows XP Professional x64 Edition — Download the update
• Microsoft Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1
— Download the update
• Microsoft Windows Server 2003 for Itanium-based Systems and Microsoft Windows
Server 2003 with SP1 for Itanium-based Systems — Download the update
• Microsoft Windows Server 2003 x64 Edition — Download the update
Non-Affected Software:
• Windows Vista
The software in this list has been tested to determine whether the versions are
affected. Other versions either no longer include security update support or may
not be affected. To determine the support life cycle for your product and version,
visit the Microsoft Support Lifecycle Web site.
Top of section
General Information
Executive Summary
Executive Summary:
This update resolves a newly discovered, privately reported, vulnerability. The
vulnerability is documented in the "Vulnerability Details" section of this bulletin.
An attacker who successfully exploited this vulnerability could take complete
control of an affected system. An attacker could then install programs; view,
change, or delete data; or create new accounts with full user rights.
We recommend that customers apply the update at the earliest opportunity.
Severity Ratings and Vulnerability Identifiers:
Vulnerability Identifiers Impact of Vulnerability Windows 2000 Service Pack 4 Windows
XP Service Pack 2 Windows Server 2003 Windows Server 2003 Service Pack 1
SNMP Memory Corruption Vulnerability - CVE-2006-5583
Remote Code Execution
Important
Important
Important
Important
This assessment is based on the types of systems that are affected by the
vulnerability, their typical deployment patterns, and the effect that exploiting
the vulnerability would have on them.
Note The severity ratings for non-x86 operating system versions map to the x86
operating systems versions as follows:
• The Windows XP Professional x64 Edition severity rating is the same as the Windows
XP Service Pack 2 severity rating.
• The Windows Server 2003 for Itanium-based Systems severity rating is the same as
the Windows Server 2003 severity rating.
• The Windows Server 2003 with Service Pack 1 for Itanium-based Systems severity
rating is the same as the Windows Server 2003 Service Pack 1 severity rating.
• The Windows Server 2003 x64 Edition severity rating is the same as the Windows
Server 2003 Service Pack 1 severity rating.
Top of section
Vulnerability Details
SNMP Memory Corruption Vulnerability - CVE-2006-5583:
A remote code execution vulnerability exists in SNMP Service that could allow an
attacker who successfully exploited this vulnerability to take complete control
of the affected system.
Mitigating Factors for SNMP Memory Corruption Vulnerability - CVE-2006-5583:
• SNMP service is not installed by default in any supported version of Windows.
• For customers who require the affected component, firewall best practices and
standard default firewall configurations can help protect networks from attacks
that originate outside the enterprise perimeter. Best practices recommend that
systems that are connected to the Internet have a minimal number of ports
exposed.
Top of section
Workarounds for SNMP Memory Corruption Vulnerability - CVE-2006-5583:
Microsoft has tested the following workarounds. Although these workarounds will
not correct the underlying vulnerability, they help block known attack vectors.
When a workaround reduces functionality, it is identified in the following section.
• Restrict the IP addresses that are allowed to manage the computer.
1. Click Start, and then click Run.
2. In the Open box, type services.msc and then click OK.
3. Click SNMP Service and select Properties.
4. Click the Security tab and select Accept SNMP packets from these hosts.
5. Add the approved management station's IP address by clicking Add, typing in the
IP address or host name, and clicking Add.
• Block the following at the firewall:
• UDP port 161
This port is used to initiate a connection with the affected component. Blocking it
at the firewall will help protect systems that are behind that firewall from attempts
to exploit this vulnerability. Also, make sure that you block any other specifically
configured SNMP port on the remote system. We recommend that you block all
unsolicited inbound communication from the Internet to help prevent attacks that may
use other ports.
• To help protect from network-based attempts to exploit this vulnerability, use a
personal firewall, such as the Windows Firewall, which is included with Windows XP.
By default, the Windows Firewall feature in Windows XP helps protect your Internet
connection by blocking unsolicited incoming traffic. We recommend that you block all
unsolicited incoming communication from the Internet.
To enable the Windows Firewall feature by using the Network Setup Wizard, follow these
steps:
• Click Start, and then click Control Panel.
• Double-click Network Connections and then click Change Windows Firewall settings.
• On the General tab, ensure that the On (recommended) value is selected. This will
enable the Windows Firewall.
• Once the Windows Firewall is enabled, select Don’t allow exceptions to prohibit all
incoming traffic.
If you want to enable certain programs and services to communicate through the firewall,
de-select Don’t allow exceptions and click the Exceptions tab. On the Exceptions tab,
select the programs, protocols, and services you want to enable.
• To help protect from network-based attempts to exploit this vulnerability, block the
affected ports by using IPSec on the affected systems.
Use Internet Protocol security (IPSec) to help protect network communications. Detailed
information about IPSec and about how to apply filters is available in Microsoft
Knowledge Base Article 313190 and Microsoft Knowledge Base Article 813878.
• Disable the SNMP service
Disabling the SNMP service will help protect the affected system from attempts to
exploit this vulnerability. To disable the SNMP service, follow these steps:
1. Click Start, and then click Control Panel. Alternatively, point to Settings, and
then click Control Panel.
2. Double-click Administrative Tools.
3. Double-click Services.
4. Double-click SNMP Service.
5. In the Startup type list, click Disabled.
6. Click Stop, and then click OK.
You can also stop and disable the SNMP service by using the following command at the
command prompt:
sc stop SNMP & sc config SNMP start= disabled
• Impact of Workaround: If you disable the SNMP service, you may not be able to monitor
systems via SNMP.
Security Update Information
Affected Software:
For information about the specific security update for your affected software,
click the appropriate link:
Windows 2000 (all versions)
Windows XP
Windows Server 2003 (all versions)
Top of section
Acknowledgments
Microsoft thanks the following for working with us to help protect customers:
• Kostya Kortchinsky of Immunity, Inc. and Clement Seguy of the European
Aeronautic Defence and Space Company for reporting the SNMP Memory Corruption
Vulnerability (CVE-2006-5583).
Obtaining Other Security Updates:
Updates for other security issues are available at the following locations:
• Security updates are available at the Microsoft Download Center. You can find
them most easily by doing a keyword search for "security_patch."
• Updates for consumer platforms are available at the Microsoft Update Web site.
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.
Security Resources:
• The Microsoft TechNet Security Web site provides additional information about
security in Microsoft products.
• TechNet Update Management Center
• Microsoft Software Update Services
• Microsoft Windows Server Update Services
• Microsoft Baseline Security Analyzer (MBSA)
• Windows Update
• Microsoft Update
• Windows Update Catalog: For more information about the Windows Update Catalog,
see Microsoft Knowledge Base Article 323166.
• Office Update
Software Update Services:
By using Microsoft Software Update Services (SUS), administrators can quickly and
reliably deploy the latest critical updates and security updates to Windows 2000
and Windows Server 2003-based servers, and to desktop systems that are running
Windows 2000 Professional or Windows XP Professional.
For more information about how to deploy security updates by using Software Update
Services, visit the Software Update Services Web site.
Windows Server Update Services:
By using Windows Server Update Services (WSUS), administrators can quickly and
reliably 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 onto Windows 2000 and later operating systems.
For more information about how to deploy security updates using Windows Server
Update Services, visit the Windows Server Update Services Web site.
Systems Management Server:
Microsoft Systems Management Server (SMS) delivers a highly configurable enterprise
solution for managing updates. By using SMS, administrators can identify Windows-
based systems that require security updates and can perform controlled deployment
of these updates throughout the enterprise with minimal disruption to end users.
For more information about how administrators can use SMS 2003 to deploy security
updates, visit the SMS 2003 Security Patch Management Web site. SMS 2.0 users can
also use Software Updates Service Feature Pack to help deploy security updates. For
information about SMS, visit the SMS Web site.
Note SMS uses the Microsoft Baseline Security Analyzer, the Microsoft Office
Detection Tool, and the Enterprise Update Scan Tool to provide broad support for
security bulletin update detection and deployment. Some software updates may not be
detected by these tools. Administrators can use the inventory capabilities of the
SMS in these cases to target updates to specific systems. For more information about
this procedure, visit the following Web site. Some security updates require
administrative rights following a restart of the system. Administrators can use the
Elevated Rights Deployment Tool (available in the SMS 2003 Administration Feature
Pack and in the SMS 2.0 Administration Feature Pack) to install these updates.
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.
Revisions:
• V1.0 (December 12, 2006): Bulletin published.
[***** End Microsoft Security Bulletin (MS06-074) *****]
_______________________________________________________________________________
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
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
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This document was prepared as an account of work sponsored by an
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