The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of Office Web Components: several vulnerabilities

Synthesis of the vulnerability 

An attacker can use several vulnerabilities of Office Web Components ActiveX, in order to execute code on victim's computer.
Impacted products: BizTalk Server, ISA, Office, Access, Excel, Outlook, PowerPoint, Project, Publisher, Visio, Word, Visual Studio.
Severity of this bulletin: 4/4.
Number of vulnerabilities in this bulletin: 4.
Creation date: 12/08/2009.
Références of this threat: 957638, BID-35642, BID-35990, BID-35991, BID-35992, CERTA-2009-AVI-331, CVE-2009-0562, CVE-2009-1136, CVE-2009-1534, CVE-2009-2496, MS09-043, VIGILANCE-VUL-8943, VU#545228, ZDI-09-054, ZDI-09-055, ZDI-09-056.

Description of the vulnerability 

Microsoft Office Web Components are installed with Office, BizTalk, Visual Studio and ISA, and provide ActiveX to publish spreadsheets and charts on a web site.

An attacker can generate an error during memory allocation, after an ActiveX has been loaded and unloaded, leading to code execution. [severity:4/4; BID-35990, CERTA-2009-AVI-331, CVE-2009-0562, ZDI-09-055]

An attacker can generate a heap memory corruption in BorderAround(). [severity:4/4; BID-35991, CVE-2009-2496, ZDI-09-056]

An attacker can use invalid parameters in order to corrupt the memory in msDataSourceObject() (VIGILANCE-VUL-8854). [severity:4/4; BID-35642, CVE-2009-1136, VU#545228, ZDI-09-054]

An attacker can generate a buffer overflow. [severity:4/4; BID-35992, CVE-2009-1534]

An attacker can therefore create an HTML page containing one of these ActiveX in order to execute code on victim's computer.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

This weakness bulletin impacts software or systems such as BizTalk Server, ISA, Office, Access, Excel, Outlook, PowerPoint, Project, Publisher, Visio, Word, Visual Studio.

Our Vigil@nce team determined that the severity of this computer weakness is critical.

The trust level is of type confirmed by the editor, with an origin of document.

This bulletin is about 4 vulnerabilities.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this vulnerability announce.

Solutions for this threat 

Office Web Components: patch.
The Microsoft announce indicates patches and workarounds.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service 

Vigil@nce provides a computers vulnerabilities watch. The Vigil@nce security watch publishes vulnerability bulletins about threats impacting the information system.