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January 2009

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Prior Updates:

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January 2009

Microsoft Security Bulletin MS09-001

Vulnerabilities in SMB Could Allow Remote Code Execution (958687)

Severity: Critical
Vulnerabilities:

• SMB Buffer Overflow Remote Code Execution Vulnerability - CVE-2008-4834
  An unauthenticated remote code execution vulnerability exists in the way that Microsoft Server Message Block (SMB) Protocol software handles specially crafted SMB packets. An attempt to exploit the vulnerability would not require authentication, allowing an attacker to exploit the vulnerability by sending a specially crafted network message to a computer running the Server service. An attacker who successfully exploited this vulnerability could take complete control of the system. Most attempts to exploit this vulnerability would result in a system denial of service condition, however remote code execution is theoretically possible
• SMB Validation Remote Code Execution Vulnerability - CVE-2008-4835
  An unauthenticated remote code execution vulnerability exists in the way that Microsoft Server Message Block (SMB) Protocol software handles specially crafted SMB packets. An attempt to exploit the vulnerability would not require authentication, allowing an attacker to exploit the vulnerability by sending a specially crafted network message to a computer running the Server service. An attacker who successfully exploited this vulnerability could cause the attacker to take complete control of the system. Most attempts to exploit this vulnerability would result in a system denial of service condition, however remote code execution is theoretically possible.
• SMB Validation Denial of Service Vulnerability - CVE-2008-4114
  A denial of service vulnerability exists in the way that Microsoft Server Message Block (SMB) Protocol software handles specially crafted SMB packets. An attempt to exploit the vulnerability would not require authentication, allowing an attacker to exploit the vulnerability by sending a specially crafted network message to a computer running the Server service. An attacker who successfully exploited this vulnerability could cause the computer to stop responding and restart.