Microsoft Windows WRITE_ANDX SMB packet denial of service

win-writeandx-dos (45146) The risk level is classified as MediumMedium Risk

Description:

The Microsoft Windows Server Message Block (SMB) Protocol is vulnerable to a denial of service, caused by improper validation of certain fields within an SMB packet. By sending specially-crafted WRITE_ANDX SMB packets to an interface allowing NULL sessions, a remote attacker could cause the system to stop responding and eventually restart.

*CVSS:

Base Score: 7.1
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Complete
 
Temporal Score: 5.9
  Exploitability: Functional
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Apply the appropriate patch for your system, as listed in the latest Microsoft Security Bulletin. See References.

— OR —

Use Microsoft Automatic Update if it is supported by your operating system. The original bulletin issued by Microsoft has been superseded.

References:

  • Javier Vicente Vallejo Advisories: Microsoft Windows WRITE_ANDX SMB command handling Kernel DoS.
  • Microsoft Security Bulletin MS09-001: Vulnerabilities in SMB Could Allow Remote Code Execution (958687).
  • Microsoft Security Bulletin MS10-012: Vulnerabilities in SMB Server Could Allow Remote Code Execution (971468).
  • Microsoft Security Bulletin MS10-054: Vulnerabilities in SMB Server Could Allow Remote Code Execution (982214).
  • Microsoft Security Bulletin MS11-020: Vulnerability in SMB Server Could Allow Remote Code Execution (2508429).
  • NORTEL BULLETIN ID: 2009009284, Rev 1: Nortel Response to Microsoft Security Bulletin MS09-001.
  • ASA-2009-011: MS09-001 Vulnerabilities in SMB Could Allow Remote Code Execution (958687)
  • BID-31179: Microsoft Windows WRITE_ANDX SMB Processing Remote Denial Of Service Vulnerability
  • CVE-2008-4114: srv.sys in the Server service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008 allows remote attackers to cause a denial of service (system crash) or possibly have unspecified other impact via an SMB WRITE_ANDX packet with an offset that is inconsistent with the packet size, related to insufficiently validating the buffer size
  • SA31883: Microsoft Windows "WRITE_ANDX" SMB Packet Handling Denial of Service
  • SECTRACK ID: 1020887: Windows SMB Processing Bug Lets Remote Users Deny Service

Platforms Affected:

  • Microsoft Windows 2000 SP4
  • Microsoft Windows 2003 Server x64
  • Microsoft Windows 2003 Server SP1 Itanium
  • Microsoft Windows 2003 Server SP1
  • Microsoft Windows Server 2003 SP2 Itanium
  • Microsoft Windows Server 2003 SP2 x64
  • Microsoft Windows Server 2003 SP2
  • Microsoft Windows Server 2008 x32
  • Microsoft Windows Server 2008 Itanium
  • Microsoft Windows Server 2008 x64
  • Microsoft Windows Vista x64
  • Microsoft Windows Vista SP1
  • Microsoft Windows Vista
  • Microsoft Windows Vista SP1 x64
  • Microsoft Windows XP SP3
  • Microsoft Windows XP SP2
  • Microsoft Windows XP x64 Professional
  • Microsoft Windows XP SP2 x64 Professional

Reported:

Sep 16, 2008

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