Signature Detail

HTTP: Microsoft Visual Studio Msmask32.ocx Unsafe ActiveX Control

This signature detects attempts to exploit a known vulnerability in Microsoft Visual Studio ActiveX control (Msmask32.ocx). An attacker can create a malicious Web site containing dangerous ActiveX calls, which if accessed by a victim, allows the attacker to gain control of the victim's browser.

Extended Description

The Microsoft Visual Studio ActiveX control, MaskedEdit, is prone to a stack-based buffer-overflow vulnerability because it fails to perform adequate boundary checks on user-supplied input. An attacker can exploit this issue to execute arbitrary code in the context of an application using the affected ActiveX control (typically Internet Explorer). Failed attacks will likely cause denial-of-service conditions. 'Msmask32.ocx' 6.0.81.69 is vulnerable; other versions may also be affected. UPDATE: Testing indicates that 'Msmask32.ocx' 6.0.84.18 is not vulnerable; we are working with Microsoft to confirm our findings and gain further details. We recommend that users install 6.0.84.18 or a later version.

Affected Products

• Microsoft Msmask32.ocx 6.0.81.69
• Microsoft Visual FoxPro 8.0
• Microsoft Visual FoxPro 8.0 SP1
• Microsoft Visual FoxPro 9.0 SP1
• Microsoft Visual FoxPro 9.0 SP2
• Microsoft Visual Studio 6.0
• Microsoft Visual Studio .NET 2002 SP1
• Microsoft Visual Studio .NET 2002
• Microsoft Visual Studio .NET 2003 SP1
• Microsoft Visual Studio .NET 2003

References

• BugTraq: 30674
• CVE: CVE-2008-3704