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AUSCERT External Security Bulletin Redistribution
ESB-2009.1174
Vulnerabilities in WINS Could Allow Remote Code Execution (969883)
12 August 2009
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AusCERT Security Bulletin Summary
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Product: Windows Internet Name Service
Publisher: Microsoft
Operating System: Microsoft Windows 2000 Server
Windows Server 2003
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2009-1924 CVE-2009-1923
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms09-039.mspx
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Microsoft Security Bulletin MS09-039 - Critical
Vulnerabilities in WINS Could Allow Remote Code Execution (969883)
Published: August 11, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves two privately reported vulnerabilities
in the Windows Internet Name Service (WINS). Either vulnerability
could allow remote code execution if a user received a specially
crafted WINS replication packet on an affected system running the WINS
service. By default, WINS is not installed on any affected operating
system version. Only customers who manually install this component are
affected by this issue.
This security update is rated Critical for all supported editions of
Microsoft Windows 2000 Server Service Pack 4 and Windows Server 2003.
For more information, see the subsection, Affected and Non-Affected
Software, in this section.
The security update addresses the vulnerabilities by correcting the
manner in which the WINS service calculates buffer length and
introducing proper data validations on received packets on the WINS
server. For more information about the vulnerabilities, see the
Frequently Asked Questions (FAQ) subsection for the specific
vulnerability entry under the next section, Vulnerability Information.
Recommendation. The majority of customers have automatic updating
enabled and will not need to take any action because this security
update will be downloaded and installed automatically. Customers who
have not enabled automatic updating need to check for updates and
install this update manually. For information about specific
configuration options in automatic updating, see Microsoft
Knowledge Base Article 294871.
For administrators and enterprise installations, or end users who want
to install this security update manually, Microsoft recommends that
customers apply the update immediately using update management
software, or by checking for updates using the Microsoft Update
service.
Known Issues. None
Affected Software
Microsoft Windows 2000 Server Service Pack 4
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Vulnerability Information
WINS Heap Overflow Vulnerability - CVE-2009-1923
A remote code execution vulnerability exists in the Windows Internet
Name Service (WINS) due to a buffer overflow caused by incorrect
calculation of buffer length when processing specially crafted WINS
network packets. 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.
WINS Integer Overflow Vulnerability - CVE-2009-1924
A remote code execution vulnerability exists in the default
configuration of the Windows Internet Name Service (WINS) due to
insufficient validation of data structures within specially crafted
WINS network packets received from a trusted WINS replication partner.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
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