FortiGuard Center

FortiGuard Advisory (FGA-2007-13)

Remote Code Execution Vulnerability in Windows Shell URI Handling
2007.November.14

Fortinet Global Security Research Team Provides Protection Against A Vulnerability in Windows URI Handling.

Summary:

A remote code execution vulnerability exists in the Windows shell when handling specially crafted URIs. An attacker can execute arbitrary code on the affected system by exploiting this vulnerability.

Impact:

Execution of arbitrary code leading to system compromise.

Risk:

Critical:

Affected Software:

Windows XP Home Edition, Windows XP Professional, Windows XP Professional 64-Bit Edition, Windows Server 2003, Web Edition, Windows Server 2003, Standard Edition, Windows Server 2003, Enterprise Edition, Windows Server 2003, Datacenter Edition, Windows Server 2003 Standard x64 Edition, Windows Server 2003 for Small Business Server, Windows Server 2003 Enterprise x64 Edition, Windows Server 2003 Enterprise Edition for Itanium-based Systems, Windows Server 2003 Datacenter x64 Edition, Windows Server 2003 Datacenter Edition for Itanium-based Systems

Non-Affected Software:

Windows 2000 Service Pack 4, Windows Vista, Windows Vista x64

Additional Information:

The vulnerability exists in the “Shell32.dll” Windows file included in Windows XP and Windows Server 2003. The vulnerability is currently being exploited on systems using Internet Explorer 7.

Solutions:
  • Fortinet Global Security Research Team has released a signature “MS.Windows.ShellExecute.URL.Handling.Code.Execution” (Attack ID: 12242) last 1st of Nov, 2007 which covers this specific vulnerability.
  • Users of Microsoft Windows XP and Server 2003 should apply the vendor supplied updates (http://www.microsoft.com/protect/computer/updates/bulletins/200711.mspx).

References:
  • FortiGuard Vulnerability Encyclopedia: http://www.fortiguardcenter.com/ids/AID12242
  • Microsoft Bulletin: http://www.microsoft.com/technet/security/Bulletin/MS07-061.mspx
  • CVE ID: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2007-5020


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About Fortinet ( www.fortinet.com ):

Fortinet is the pioneer and leading provider of ASIC-accelerated unified threat management, or UTM, security systems, which are used by enterprises and service providers to increase their security while reducing total operating costs. Fortinet solutions were built from the ground up to integrate multiple levels of security protection--including firewall, antivirus, intrusion prevention, VPN, spyware prevention and anti-spam -- designed to help customers protect against network and content level threats. Leveraging a custom ASIC and unified interface, Fortinet solutions offer advanced security functionality that scales from remote office to chassis-based solutions with integrated management and reporting. Fortinet solutions have won multiple awards around the world and are the only security products that are certified in six programs by ICSA Labs: (Firewall, Antivirus, IPSec, SSL, Network IPS, and Anti-Spyware). Fortinet is privately held and based in Sunnyvale, California.