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Vulnerability Alert

Microsoft Windows TCP/IP Timestamp Packet Processing Code Execution Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:18958
Version:1
First Published:2009 September 08 19:04 GMT
Last Published:2009 September 08 19:04 GMT
Port: Not available
CVE:CVE-2009-1925
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:10.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:7.4
Related Resources:
View related IPS Signature
 
 
Version Summary:

Microsoft Windows contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on an affected system.  Updates are available.

 
 
Description

Microsoft Windows Vista SP2 and prior and Windows Server 2008 SP2 and prior contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on an affected system.

This vulnerability exists due to errors when handling input contained within TCP/IP packets.  An unauthenticated, remote attacker could exploit this vulnerability by sending a malicious network packet to the vulnerable system.  If the exploit is successful, the attacker could execute code resulting in a complete system compromise.

Microsoft has confirmed this vulnerability in a security bulletin and released software updates that correct it.

 
Warning Indicators

Systems running the following versions of Microsoft Windows are vulnerable:

  • Windows Vista SP2 and prior
  • Windows Vista x64 Edition SP2 and prior
  • Windows Server 2008 for 32-bit Systems SP2 and prior
  • Windows Server 2008 for x64-based Systems SP2 and prior
  • Windows Server 2008 for Itanium-based Systems SP2 and prior
 
IntelliShield Analysis

Attackers only need to send malicious TCP/IP packets to a vulnerable system in order to accomplish an exploit, which would render all Internet-facing servers potentially vulnerable to external exploitation.  Because technical details have not yet been released publicly, the development of exploits may be delayed.  Administrators are advised to apply available patches immediately.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the September 2009 security bulletin release. This Cisco bulletin, which assists administrators in identifying or mitigating these vulnerabilities using Cisco devices, is available at the following link: Cisco Applied Mitigation Bulletin: Microsoft Security Bulletin Release for September 2009

The update available from Microsoft corrects this vulnerability by changing the way Windows processes TCP/IP packets.

 
Vendor Announcements

Microsoft has released a security bulletin at the following link: MS09-048

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with elevated privileges, possibly resulting in a complete system compromise.

 
Technical Information

This vulnerability exists due to errors in handling input contained within TCP/IP packets.  Windows may treat data as a function pointer when a field contains other data that is potentially supplied by the user.  An unauthenticated, remote attacker could exploit this vulnerability by sending malicious TCP/IP packets to the affected system.  The processing of data contained within the network packets could cause memory corruption that the attacker could leverage to execute arbitrary code.

 
Safeguards

Administrators are advised to apply the available software updates.

Administrators are advised to restrict network access to affected systems.

Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.

Administrators are advised to monitor critical systems.

 
Patches/Software

Microsoft customers can obtain updates directly by using the links in the security bulletin. These updates are also distributed by Windows automatic update features and available on the Windows Update website. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.


Signatures
 
Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
1330/16TCP Drop - PAWS check failedS6422012 Apr 19 
 
Alert History
 

Initial Release



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Microsoft, Inc.Windows Server 2008 Datacenter Edition Base, SP1, SP2 | Datacenter Edition, 64-bit Base, SP2 | Itanium-Based Systems Edition Base, SP1, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition, 64-bit Base, SP2 | Essential Business Server Standard Base, SP1, SP2 | Essential Business Server Premium Base, SP1, SP2 | Essential Business Server Premium, 64-bit Base, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition, 64-bit Base, SP1, SP2 | Web Server Base, SP1, SP2 | Web Server, 64-bit Base, SP1, SP2
Microsoft, Inc.Windows Vista Home Basic Base, SP1, SP2 | Home Premium Base, SP1, SP2 | Business Base, SP1, SP2 | Enterprise Base, SP1, SP2 | Ultimate Base, SP1, SP2 | Home Basic x64 Edition Base, SP1, SP2 | Home Premium x64 Edition Base, SP1, SP2 | Business x64 Edition Base, SP1, SP2 | Enterprise x64 Edition Base, SP1, SP2 | Ultimate x64 Edition Base, SP1, SP2

Associated Products:
N/A




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