• Product Information
• Security Products Overview
• Juniper Networks ISG Series
• IDP Demo
• Product Poster & Z-Card 

Title: Microsoft Windows Malicious Shortcut Handling Remote Code Execution Vulnerability

Severity: CRITICAL

Description:

Microsoft Windows is prone to a remote code execution vulnerability when handling a malicious shortcut (.lnk) file. This issue may allow an attacker to completely compromise a vulnerable computer.

The vulnerability arises because Windows does not handle certain properties of an .lnk file in a secure manner. Specifically, the issue results from a boundary condition error, as user-supplied data is copied into static process buffers without performing boundary checks.

This issue occurs in the 'DoFontEnum()' function of 'winsrv.dll', when a Unicode string 'FaceName' is copied to a memory buffer without first bounds checking the input data. This occurs when a shortcut file contains an excessively long font name property and is handled by the Client/Server Runtime Server Subsystem (CSRSS) process.

An attacker can exploit this issue by crafting a malicious file and placing it on a Web site or sending it to a user through email followed by enticing them to open it and view the file's properties.

It should be noted that remote exploitation of this issue requires user interaction as a vulnerable user must follow certain steps after visiting an attacker's site before this vulnerability is triggered. If email is employed as an attack vector, the user must open the .lnk file sent as an email attachment before this issue presents itself.

This issue also poses a local threat as a local unprivileged attacker could exploit this issue without user interaction to gain elevated privileges.

This vulnerability can facilitate arbitrary code execution with SYSTEM privileges.

This BID is related to the issue described in BID 15070 (Microsoft Windows Malicious Shortcut Handling Remote Code Execution Variant Vulnerability).

Affected Products:

• Avaya DefinityOne Media Servers
• Avaya DefinityOne Media Servers R10
• Avaya DefinityOne Media Servers R11
• Avaya DefinityOne Media Servers R12
• Avaya DefinityOne Media Servers R6
• Avaya DefinityOne Media Servers R7
• Avaya DefinityOne Media Servers R8
• Avaya DefinityOne Media Servers R9
• Avaya IP600 Media Servers
• Avaya IP600 Media Servers R10
• Avaya IP600 Media Servers R11
• Avaya IP600 Media Servers R12
• Avaya IP600 Media Servers R6
• Avaya IP600 Media Servers R7
• Avaya IP600 Media Servers R8
• Avaya IP600 Media Servers R9
• Avaya S3400 Message Application Server
• Avaya S8100 Media Servers
• Avaya S8100 Media Servers R10
• Avaya S8100 Media Servers R11
• Avaya S8100 Media Servers R12
• Avaya S8100 Media Servers R6
• Avaya S8100 Media Servers R7
• Avaya S8100 Media Servers R8
• Avaya S8100 Media Servers R9
• Avaya Unified Communication Center
• 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 Datacenter Server SP3
• Microsoft Windows 2000 Datacenter Server SP4
• 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 Server 4.0 SP6a
• Microsoft Windows Server 2003 Datacenter Edition
• Microsoft Windows Server 2003 Datacenter Edition Itanium
• Microsoft Windows Server 2003 Datacenter Edition Itanium SP1
• Microsoft Windows Server 2003 Datacenter Edition SP1
• Microsoft Windows Server 2003 Datacenter x64 Edition
• Microsoft Windows Server 2003 Enterprise Edition
• Microsoft Windows Server 2003 Enterprise Edition Itanium
• Microsoft Windows Server 2003 Enterprise Edition Itanium SP1
• Microsoft Windows Server 2003 Enterprise Edition SP1
• Microsoft Windows Server 2003 Enterprise x64 Edition
• Microsoft Windows Server 2003 Standard Edition
• Microsoft Windows Server 2003 Standard Edition SP1
• Microsoft Windows Server 2003 Standard x64 Edition
• Microsoft Windows Server 2003 Web Edition
• Microsoft Windows Server 2003 Web Edition SP1
• 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 Professional x64 Edition
• Microsoft Windows XP Tablet PC Edition
• Microsoft Windows XP Tablet PC Edition SP1
• Microsoft Windows XP Tablet PC Edition SP2
• Nortel Networks Centrex IP Client Manager
• Nortel Networks Centrex IP Client Manager 2.5.0
• Nortel Networks Centrex IP Client Manager 7.0.0
• Nortel Networks Centrex IP Client Manager 8.0.0
• Nortel Networks Centrex IP Element Manager 2.5.0
• Nortel Networks Centrex IP Element Manager 7.0.0
• Nortel Networks Centrex IP Element Manager 8.0.0

References:

• Cesar <cesarc56@yahoo.com>: Story of a dumb patch
• Microsoft: Microsoft Security Bulletin MS05-049
• Nortel Networks: Centrex IP Client Manager (CICM) response to Microsoft October security bulletin

Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.