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AUSCERT External Security Bulletin Redistribution
ESB-2009.0222 -- [Win]
Vulnerabilities in DNS and WINS Server Could Allow Spoofing
11 March 2009
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AusCERT Security Bulletin Summary
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Product: DNS Server
WINS Server
Publisher: Microsoft
Operating System: Windows 2000
Windows Server 2003
Windows Server 2008
Impact: Provide Misleading Information
Access: Remote/Unauthenticated
CVE Names: CVE-2009-0234 CVE-2009-0233 CVE-2009-0094
CVE-2009-0093
Ref: AL-2009.0016
Original Bulletin:
http://www.microsoft.com/technet/security/Bulletin/MS09-008.mspx
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Microsoft Security Bulletin MS09-008 - Important
Vulnerabilities in DNS and WINS Server Could Allow Spoofing (962238)
Published: March 10, 2009
Version: 1.0
General Information
Executive Summary
This security update resolves two privately reported vulnerabilities
and two publicly disclosed vulnerabilities in Windows DNS server and
Windows WINS server. These vulnerabilities could allow a remote
attacker to redirect network traffic intended for systems on the
Internet to the attacker's own systems.
This security update is rated Important for all supported editions of
Microsoft Windows 2000 Server, Windows Server 2003, and Windows Server
2008. For more information, see the subsection, Affected and
Non-Affected Software, in this section.
The security update addresses the vulnerabilities by correcting the
way that Windows DNS servers cache and validate queries, and by
modifying the way that Windows DNS servers and Windows WINS servers
handle WPAD and ISATAP registration. 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 294781.
For administrators and enterprise installations, or end users who want
to install this security update manually, Microsoft recommends that
customers apply the update at the earliest opportunity using update
management software, or by checking for updates using the
Microsoft Update service.
Affected Software
DNS server on Microsoft Windows 2000 Server Service Pack 4
WINS server on Microsoft Windows 2000 Server Service Pack 4
DNS server on Windows Server 2003 Service Pack 1 and Windows
Server 2003 Service Pack 2
WINS server on Windows Server 2003 Service Pack 1 and Windows
Server 2003 Service Pack 2
DNS server on Windows Server 2003 x64 Edition and Windows Server
2003 x64 Edition Service Pack 2
WINS server on Windows Server 2003 x64 Edition and Windows Server
2003 x64 Edition Service Pack 2
DNS server on Windows Server 2003 with SP1 for Itanium-based
Systems and Windows Server 2003 with SP2 for Itanium-based Systems
WINS server on Windows Server 2003 with SP1 for Itanium-based
Systems and Windows Server 2003 with SP2 for Itanium-based Systems
DNS server on Windows Server 2008 for 32-bit Systems
DNS server on Windows Server 2008 for x64-based Systems
Vulnerability Information
DNS Server Query Validation Vulnerability - CVE-2009-0233
A spoofing vulnerability exists in Windows DNS server. This
vulnerability could allow a remote unauthenticated attacker to quickly
and reliably spoof responses and insert records into the DNS server's
cache, thereby redirecting Internet traffic.
Workarounds for DNS Server Query Validation Vulnerability - CVE-2009-0233
Microsoft has not identified any workarounds for this vulnerability.
DNS Server Response Validation Vulnerability - CVE-2009-0234
A response validation vulnerability exists in Windows DNS Server. The
vulnerability could allow an unauthenticated remote attacker to send
specially crafted queries to a DNS server so as to allow greater
predictability of transaction IDs used by the DNS server and thus to
redirect Internet traffic from legitimate locations.
Workarounds for DNS Server Response Validation Vulnerability - CVE-2009-0234
Microsoft has not identified any workarounds for this vulnerability.
DNS Server Vulnerability in WPAD Registration Vulnerability- CVE-2009-0093
A man-in-the-middle attack vulnerability exists in Windows DNS servers
where dynamic update is used and ISATAP and WPAD are not already
registered in DNS. This vulnerability could allow a remote
authenticated attacker to spoof a web proxy thereby redirect Internet
traffic to an address of the attacker's choice.
Workarounds for DNS Server Vulnerability in WPAD Registration Vulnerability-
CVE-2009-0093
Create a WPAD.DAT Proxy Auto Configuration File on a Host Named WPAD
in Your Organization to Direct Web Browsers to Your Organization's
Proxy
WPAD WINS Server Registration Vulnerability - CVE-2009-0094
A man-in-the-middle attack vulnerability exists in Windows WINS
servers. This vulnerability could allow a remote authenticated
attacker to spoof a web proxy and thereby redirect Internet traffic to
an address of the attacker's choice.
Workarounds for WPAD WINS Server Registration Vulnerability - CVE-2009-0094
Create a WPAD.DAT Proxy Auto Configuration File on a Host Named WPAD
in Your Organization to Direct Web Browsers to Your Organization's
Proxy
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