Title: Microsoft Windows SMB2 '_Smb2ValidateProviderCallback()' Remote Code Execution Vulnerability
Severity: CRITICAL
Description:
Server Message Block 2 (SMB2) is a newer version of the SMB protocol. SMB2 was introduced in Microsoft Windows Vista.
Windows is prone to a remote code-execution vulnerability when processing the protocol headers for the SMB Negotiate Protocol Request. This issue affects the '_Smb2ValidateProviderCallback()' function in the 'srv2.sys' driver. Specifically, the software fails to sufficiently validate the 'Process ID High' header field contained in an SMB2 request before using it to construct a pointer into a function table.
NOTE: Reportedly, for this issue to be exploitable, file sharing must be enabled.
An attacker can exploit this issue to execute code with SYSTEM-level privileges; failed exploit attempts will likely cause denial-of-service conditions.
Windows 7 RC, Vista and 2008 Server are vulnerable; other versions may also be affected.
NOTE: Reportedly, Windows XP and 2000 are not affected.
UPDATE (September 9, 2009): Symantec has confirmed the issue on Windows Vista SP1 and Windows Server 2008.
Affected Products:
- Microsoft Windows 7 RC
- Microsoft Windows 7 beta
- Microsoft Windows Server 2008 Datacenter Edition
- Microsoft Windows Server 2008 Datacenter Edition SP2
- Microsoft Windows Server 2008 Enterprise Edition
- Microsoft Windows Server 2008 Enterprise Edition SP2
- Microsoft Windows Server 2008 Standard Edition
- Microsoft Windows Server 2008 Standard Edition SP2
- Microsoft Windows Server 2008 for 32-bit Systems
- Microsoft Windows Server 2008 for 32-bit Systems SP2
- Microsoft Windows Server 2008 for Itanium-based Systems
- Microsoft Windows Server 2008 for Itanium-based Systems SP2
- Microsoft Windows Server 2008 for x64-based Systems
- Microsoft Windows Server 2008 for x64-based Systems SP2
- Microsoft Windows Vista Business
- Microsoft Windows Vista Business 64-bit edition
- Microsoft Windows Vista Business 64-bit edition SP1
- Microsoft Windows Vista Business 64-bit edition SP2
- Microsoft Windows Vista Business SP1
- Microsoft Windows Vista Business SP2
- Microsoft Windows Vista Enterprise
- Microsoft Windows Vista Enterprise 64-bit edition
- Microsoft Windows Vista Enterprise 64-bit edition SP1
- Microsoft Windows Vista Enterprise 64-bit edition SP2
- Microsoft Windows Vista Enterprise SP1
- Microsoft Windows Vista Enterprise SP2
- Microsoft Windows Vista Home Basic
- Microsoft Windows Vista Home Basic 64-bit edition
- Microsoft Windows Vista Home Basic 64-bit edition SP1
- Microsoft Windows Vista Home Basic 64-bit edition SP2
- Microsoft Windows Vista Home Basic SP1
- Microsoft Windows Vista Home Basic SP2
- Microsoft Windows Vista Home Premium
- Microsoft Windows Vista Home Premium 64-bit edition
- Microsoft Windows Vista Home Premium 64-bit edition SP1
- Microsoft Windows Vista Home Premium 64-bit edition SP2
- Microsoft Windows Vista Home Premium SP1
- Microsoft Windows Vista Home Premium SP2
- Microsoft Windows Vista Ultimate
- Microsoft Windows Vista Ultimate 64-bit edition
- Microsoft Windows Vista Ultimate 64-bit edition SP1
- Microsoft Windows Vista Ultimate 64-bit edition SP2
- Microsoft Windows Vista Ultimate SP1
- Microsoft Windows Vista Ultimate SP2
- Microsoft Windows Vista x64 Edition
- Microsoft Windows Vista x64 Edition SP1
- Microsoft Windows Vista x64 Edition SP2
References:
- CVE: CVE-2009-3103
- Laurent Gaffie: More explication on CVE-2009-3103
- Laurent Gaffié: Windows Vista/7 : SMB2.0 NEGOTIATE PROTOCOL REQUEST Remote B.S.O.D.
- Microsoft: Microsoft Security Advisory (975497) Vulnerabilities in SMB Could Allow Remote C
- Microsoft: Microsoft Security Advisory 975497 Released
- Microsoft: Microsoft Security Bulletin MS09-050
- Microsoft: Microsoft Windows 7 Homepage
- Microsoft: Update on the SMB vulnerability situation
- Microsoft: Windows Vista Homepage
- Piotr Bania: SMB2: 351 Packets from the Trampoline
- Ruben Santamarta: Acerca del BSOD de srv2.sys
- Rubén: Regarding SMB2.0 Negotiate BSOD published by Laurent Gaffié
- US-CERT: Vulnerability Note VU#135940 Windows SMB version 2 vulnerability
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