Software Engineering Institute

Intuit QuickBooks Online Edition is a version of QuickBooks that functions within Internet Explorer as an ActiveX control. This ActiveX control contains multiple stack buffer overflow vulnerabilities, which can allow an overwrite of the process Structured Exception Handler (SEH).

By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), an attacker may be able to execute arbitrary code with the privileges of the user. The attacker could also cause Internet Explorer (or the program using the WebBrowser control) to crash.

Apply an update

This issue is addressed in version 10 of the QuickBooks Online Edition ActiveX control. The fixed version of the QuickBooks Online Edition ActiveX control can be installed from the QuickBooks Online Edition web site.

The vulnerable ActiveX controls are also disabled in Microsoft Security Bulletin MS07-069.

Disable the QuickBooks Online Edition ActiveX control in Internet Explorer

The vulnerable QuickBooks Online Edition ActiveX controls (versions 9 and earlier) can be disabled in Internet Explorer by setting the kill bit for the following CLSIDs:

{CF9DEB90-8DE3-11D5-BAE4-00105AAAFF94}
{4F720B9C-24B1-4948-A035-8853DC01F19E}
{2EFF8C97-F2A8-4395-9F47-9A06F998BF88}
{2CC3D8DE-18BF-43ff-8CB8-21B442300FD5}
{DBB177CC-6908-4b53-9BEE-F1C697818D65}
{A80D199B-CFDD-4da4-8C47-2310D5B8DD97}
{0D3983A9-4E29-4f33-8313-DA22B29D3F87}
{D92D7607-05D9-4dd8-B68B-D458948FB883}
{8CE3BAE6-AB66-40b6-9019-41E5282FF1E2}
{40F8967E-34A6-474a-837A-CEC1E7DAC54C}
More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{CF9DEB90-8DE3-11D5-BAE4-00105AAAFF94}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{4F720B9C-24B1-4948-A035-8853DC01F19E}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{2EFF8C97-F2A8-4395-9F47-9A06F998BF88}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{2CC3D8DE-18BF-43ff-8CB8-21B442300FD5}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{DBB177CC-6908-4b53-9BEE-F1C697818D65}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{A80D199B-CFDD-4da4-8C47-2310D5B8DD97}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{0D3983A9-4E29-4f33-8313-DA22B29D3F87}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{D92D7607-05D9-4dd8-B68B-D458948FB883}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{8CE3BAE6-AB66-40b6-9019-41E5282FF1E2}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
Compatibility\{40F8967E-34A6-474a-837A-CEC1E7DAC54C}]
"Compatibility Flags"=dword:00000400
Disable ActiveX

Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document.