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Vulnerability:Win/SMB.Srv.RCE!CVE-2010-0020

Severity rating
Important

Class/Type
Vulnerability

Discovered date
2010-02-09T13:54:28

Attack vector
Remote

Authentication required
No

Public exploits available
Yes

Signature detection
Medium



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Description

An authenticated remote code execution vulnerability exists in the way that Microsoft Server Message Block (SMB) Protocol software handles specially crafted SMB packets. An attacker could exploit the vulnerability by sending a specially crafted network message to a system running the Server service as an authenticated user. While an attacker who successfully exploited this vulnerability could take complete control of the affected system, attempts to exploit this vulnerability will most probably result in a Denial of Service condition.



Impact

An attacker who successfully exploited this vulnerability could take complete control of an affected system.



Technical details (analysis)

The vulnerability is caused by the Microsoft Server Message Block (SMB) implementation improperly validating fields in a malformed SMB request. Microsoft Server Message Block (SMB) Protocol is a Microsoft network file sharing protocol used in Microsoft Windows. An attacker could try to exploit the vulnerability by creating a specially crafted SMB packet and sending the packet to an affected system.



Affected software

Microsoft Windows 2000 Service Pack 4
Windows XP Service Pack 2 and Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service Pack 2
Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2*
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2*
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems*
Windows Server 2008 R2 for Itanium-based Systems



Non-affected software

All applications not on the affected list.



References




Solutions




NIS signature

Name: Vulnerability:Win/SMB.Srv.RCE!CVE-2010-0020
Release Date: 2010-02-09T13:54:28



Known false positives

No known false positives at this time.



Work-arounds

Disable SMB v2
Block TCP ports 139 and 445 at the firewall