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A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2008.0002 -- AUSCERT ALERT
                                   [Win]
           Windows Kernel TCP/IP/IGMPv3 and MLDv2 Vulnerability
                              9 January 2008

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        AusCERT Alert Summary
        ---------------------

Product:              Windows 2000
                      Windows XP
                      Windows Server 2003
                      Windows Vista
Publisher:            Microsoft
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-0069

Original Bulletin:    
     http://www.microsoft.com/technet/security/bulletin/ms08-001.mspx

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Microsoft Security Bulletin MS08-001  Critical
Vulnerabilities in Windows TCP/IP Could Allow Remote Code Execution (941644)

Affected Software

- - Microsoft Windows 2000 Service Pack 4
- - Windows XP Service Pack 2
- - Windows XP Professional x64 Edition and 
  Windows XP Professional x64 Edition Service Pack 2
- - Windows Server 2003 Service Pack 1 and 
  Windows Server 2003 Service Pack 2
- - Windows Server 2003 x64 Edition and 
  Windows Server 2003 x64 Edition Service Pack 2
- - Windows Server 2003 with SP1 for Itanium-based Systems and 
  Windows Server 2003 with SP2 for Itanium-based Systems
- - Windows Vista
  Windows Vista x64 Edition 


- From the Microsoft Security Bulletin MS08-001:

Vulnerability Details

Windows Kernel TCP/IP/IGMPv3 and MLDv2 Vulnerability - CVE-2007-0069

A remote code execution vulnerability exists in the Windows kernel due to 
the way that the Windows kernel handles TCP/IP structures storing the 
state of IGMPv3 and MLDv2 queries. Supported editions of Microsoft Windows 
XP, Windows Server 2003, and Windows Vista all support IGMPv3. In addition 
to IGMPv3, Windows Vista supports MDLv2, which adds multicast support for 
IPv6 networks. An anonymous attacker could exploit the vulnerability by 
sending specially crafted IGMPv3 and MLDv2 packets to a computer over the 
network. 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.

Please note this vulnerability does not affect Microsoft Windows 2000 
Service Pack 4

Impact

- - Remote Code Execution

Workarounds

- - Disable IGMP and MLD processing
  - See the Microsoft bulletin for instructions
- - Block IGMP and MLD on perimeter firewalls
- - Block IGMP and MLD inbound on Vista Firewall
  - See the Microsoft bulletin for instructions

Solution

- - Apply the Microsoft Update


Windows Kernel TCP/IP/ICMP Vulnerability - CVE-2007-0066

A denial of service vulnerability exists in TCP/IP due to the way that 
Windows Kernel processes fragmented router advertisement ICMP queries. 
ICMP Router Discovery Protocol (RDP) is not enabled by default and is 
required in order to exploit this vulnerability. However, on Windows 2003 
Server and on Windows XP, RDP can be turned on by a setting in DHCP or by 
a setting in the registry. On Windows 2000, RDP can be turned on by a 
setting in the registry. An anonymous attacker could exploit the 
vulnerability by sending specially crafted ICMP packets to a computer 
over the network. An attacker who successfully exploited this 
vulnerability could cause the computer to stop responding and 
automatically restart.

Please note this vulnerability does not affect Microsoft Windows Vista

Impact

- - Denial of Service (DoS)

Workarounds

- - Disable Router Discovery Protocol Processing
  - See the Microsoft bulletin for instructions 

Solution

- - Apply the Microsoft Update

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This security bulletin is provided as a service to AusCERT\'s members.  As
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        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
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