FortiGuard Center

FortiGuard Advisory (FGA-2007-08)

Multiple Vulnerabilities Affecting Microsoft Speech Control.
2007.June.12

Fortinet Global Security Research Team Discovers Multiple Vulnerabilities Affecting Microsoft Speech Control.

Summary:

Two remote buffer overflow vulnerabilities exist in the "Xvoice.dll" ActiveX component of Microsoft Speech. An attacker can execute arbitrary code on the affected system by exploiting either vulnerability.

Risk:

  • Critical

Affected Software:

  • Microsoft Speech 4.0a

Additional Information:

A remote attacker could construct a malicious web page, referencing the vulnerable functions and setting the vulnerable argument to a very long value. This could lead to a buffer overflow ( one on the stack, the other on the heap ), which could result in the execution of abitrary code and allow full control of the affected system.

This vulnerability is due to improper sanitization of remotely supplied data.

Solution:

  • Use the workaround provided by Microsoft in (MS07-033)

Credits:

  • Fortinet Global Security Research Team

References:



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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.