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Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow
Secunia Advisory: SA26960
Release Date: 2007-09-25
Last Update: 2007-09-28
Popularity: 8,244 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Unpatched

Software:Ask Toolbar 4.x

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CVE reference:CVE-2007-5107


Description:
Joey Mengele has discovered a vulnerability in Ask Toolbar, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error in the AskJeevesToolBar.SettingsPlugin.1 ActiveX control (askBar.dll) when handling the "ShortFormat" property. This can be exploited to cause a stack-based buffer overflow by assigning an overly long (greater than 500 bytes) string to the affected property.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in version 4.0.2. Other versions may also be affected.

Solution:
Set the kill-bit for the affected ActiveX control.

Provided and/or discovered by:
Joey Mengele

Changelog:
2007-09-28: Added CVE reference.

Original Advisory:
http://www.milw0rm.com/exploits/4452

Extended Solution:
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