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Policy:Win/SMB.NegotiateResponse.RCE!CVE-2010-0017

Severity rating
Critical

Class/Type
Policy

Discovered date
2010-02-09T00:00:00

Attack vector
Remote

Authentication required
No

Public exploits available
Yes

Signature detection
Medium



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Description

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 SMB response to client-initiated SMB request. An attacker who successfully exploited this vulnerability could take complete control of the system. On Windows Vista and Windows Server 2008, this vulnerability could result in an elevation of privilege vulnerability due to the way that Microsoft Server Message Block (SMB) Protocol software handles specially crafted SMB negotiate responses. An attacker who successfully exploited this vulnerability could run arbitrary code with system-level privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. An attacker must have valid logon credentials and be able to log on locally to elevate privileges in this manner. This vulnerability could also result in a denial of service. An attempt to exploit the vulnerability in this manner would not require authentication, allowing an attacker to exploit the vulnerability by sending a specially crafted SMB response to a client-initiated SMB request. An attacker who successfully exploited this vulnerability could cause the computer to stop responding until restarted.



Impact

An attacker who successfully exploited this vulnerability could take complete control of an affected system. On Windows Vista and Windows Server 2008, an attacker who successfully exploited this vulnerability could run arbitrary code with system-level privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. An attacker who successfully exploited this vulnerability leading to a denial of service could cause a user's system to stop responding until manually restarted.



Technical details (analysis)

The vulnerability is caused by the Microsoft Server Message Block (SMB) client implementation improperly handling a race condition that can occur when handling Negotiate responses. Microsoft Server Message Block (SMB) protocol is a Microsoft network file sharing protocol used in Microsoft Windows.



Affected software

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 Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-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: Policy:Win/SMB.NegotiateResponse.RCE!CVE-2010-0017
Release Date: 2010-02-09T00:00:00



Known false positives

This signature can cause false positives if you've already applied the patch.



Work-arounds

Block TCP ports 139 and 445 at the firewall