Title: Microsoft Windows Server Message Block Handlers Remote Buffer Overflow Vulnerability
Severity: CRITICAL
Description:
Microsoft Windows is reported prone to a remote buffer-overflow vulnerability because the affected service fails to securely copy user-supplied data into finite process buffers.
The problem presents itself when an affected computer connects to a malicious Server Message Block (SMB) server. Apparently, the driver responsible for performing SMB client operations and dealing with responses from an SMB server, MRXSMB.SYS, fails to properly handle transaction-response data.
Specifically, maliciously crafted SMB Trans (25h) and Trans2 (32h) commands, both RPC-over-named-pipes, will trigger an overflow. Reportedly, one specific example shows that it is possible to specify the filename and short filename length fields in a Trans2 FIND_FIRST2 response with excessively large values, triggering a large 'memcpy()' function to be carried out. By using a file link in the above case, it is reportedly possible to trigger code execution once the file link is followed. Reportedly, the 'QUERY_FILE_INFORMATION' response and other unspecified responses may trigger this condition as well.
Note that since SMB drivers execute in the kernel memory space, a successful attack can grant a remote attacker unauthorized access with ring-0 privileges.
Microsoft has noted that other protocols, such as IPX/SPX, could also be vulnerable to this issue.
**Update: Microsoft Windows NT 4.0 has also been reported vulnerable to this issue.
Affected Products:
- Avaya DefinityOne Media Servers
- Avaya IP600 Media Servers
- Avaya S3400 Message Application Server
- Avaya S8100 Media Servers
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Advanced Server SP1
- Microsoft Windows 2000 Advanced Server SP2
- Microsoft Windows 2000 Advanced Server SP3
- Microsoft Windows 2000 Advanced Server SP4
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows 2000 Datacenter Server SP1
- Microsoft Windows 2000 Datacenter Server SP2
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Professional SP1
- Microsoft Windows 2000 Professional SP2
- Microsoft Windows 2000 Professional SP3
- Microsoft Windows 2000 Professional SP4
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Server SP1
- Microsoft Windows 2000 Server SP2
- Microsoft Windows 2000 Server SP3
- Microsoft Windows 2000 Server SP4
- Microsoft Windows 2000 Terminal Services
- Microsoft Windows 2000 Terminal Services SP1
- Microsoft Windows 2000 Terminal Services SP2
- Microsoft Windows NT Enterprise Server 4.0
- Microsoft Windows NT Enterprise Server 4.0 SP1
- Microsoft Windows NT Enterprise Server 4.0 SP2
- Microsoft Windows NT Enterprise Server 4.0 SP3
- Microsoft Windows NT Enterprise Server 4.0 SP4
- Microsoft Windows NT Enterprise Server 4.0 SP5
- Microsoft Windows NT Enterprise Server 4.0 SP6
- Microsoft Windows NT Enterprise Server 4.0 SP6a
- Microsoft Windows NT Server 4.0
- Microsoft Windows NT Server 4.0 SP1
- Microsoft Windows NT Server 4.0 SP2
- Microsoft Windows NT Server 4.0 SP3
- Microsoft Windows NT Server 4.0 SP4
- Microsoft Windows NT Server 4.0 SP5
- Microsoft Windows NT Server 4.0 SP6
- Microsoft Windows NT Server 4.0 SP6a
- Microsoft Windows NT Terminal Server 4.0
- Microsoft Windows NT Terminal Server 4.0 SP1
- Microsoft Windows NT Terminal Server 4.0 SP2
- Microsoft Windows NT Terminal Server 4.0 SP3
- Microsoft Windows NT Terminal Server 4.0 SP4
- Microsoft Windows NT Terminal Server 4.0 SP5
- Microsoft Windows NT Terminal Server 4.0 SP6
- Microsoft Windows NT Terminal Server 4.0 SP6a
- Microsoft Windows NT Workstation 4.0
- Microsoft Windows NT Workstation 4.0 SP1
- Microsoft Windows NT Workstation 4.0 SP2
- Microsoft Windows NT Workstation 4.0 SP3
- Microsoft Windows NT Workstation 4.0 SP4
- Microsoft Windows NT Workstation 4.0 SP5
- Microsoft Windows NT Workstation 4.0 SP6
- Microsoft Windows NT Workstation 4.0 SP6a
- Microsoft Windows Server 2003 Datacenter Edition
- Microsoft Windows Server 2003 Datacenter Edition Itanium
- Microsoft Windows Server 2003 Enterprise Edition
- Microsoft Windows Server 2003 Enterprise Edition Itanium
- Microsoft Windows Server 2003 Standard Edition
- Microsoft Windows Server 2003 Web Edition
- Microsoft Windows XP 64-bit Edition
- Microsoft Windows XP 64-bit Edition SP1
- Microsoft Windows XP 64-bit Edition Version 2003
- Microsoft Windows XP 64-bit Edition Version 2003 SP1
- Microsoft Windows XP Home
- Microsoft Windows XP Home SP1
- Microsoft Windows XP Home SP2
- Microsoft Windows XP Media Center Edition
- Microsoft Windows XP Media Center Edition SP1
- Microsoft Windows XP Media Center Edition SP2
- Microsoft Windows XP Professional
- Microsoft Windows XP Professional SP1
- Microsoft Windows XP Professional SP2
- Microsoft Windows XP Tablet PC Edition
- Microsoft Windows XP Tablet PC Edition SP1
- Microsoft Windows XP Tablet PC Edition SP2
- Nortel Networks IP softphone 2050
- Nortel Networks Mobile Voice Client 2050
- Nortel Networks Optivity Network Management System
- Nortel Networks Symposium Call Center Server (SCCS)
- Nortel Networks Symposium Express Call Center (SECC)
References:
- Dave Aitel <dave@immunityinc.com>: [Dailydave] ID, Apples
- Immunity, Inc.: GREENAPPLE: SMB remote vulnerabilities in Windows
- Microsoft: Microsoft Security Bulletin MS05-011
- Nortel Networks: Security Advisory Bulletins
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