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Forum Thread: Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow

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See the original Secunia advisory:
Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow

Secunia Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow
Secunia Official 24th Oct, 2010 16:41
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User Since: -
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Location: Copenhagen, DK
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.

vpmigliore

RE: Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow
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vpmigliore RE: Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow
Member 24th Oct, 2010 16:58
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Posts: 5
User Since: 20th Oct 2010
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Location: US
Last edited on 24th Oct, 2010 16:58
"Set the kill-bit for the affected ActiveX control."

-- And please offer some guidance as to how to go about doing that. I will try to do so if you tell me how. Thanks in advance!!
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ddmarshall RE: Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow
Dedicated Contributor 24th Oct, 2010 17:05
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Location: UK
Last edited on 24th Oct, 2010 17:53
Killbits are normally set by a Microsoft Update.
http://blogs.technet.com/b/srd/archive/2008/02/06/...
http://blogs.technet.com/b/srd/archive/2008/02/07/...
http://blogs.technet.com/b/srd/archive/2008/02/08/...
http://support.microsoft.com/default.aspx?scid=htt...

You can determine the Class ID of the ActiveX by choosing the Manage Addons option in Internet Explorer Tools. Select the ActiveX in the list and then click 'more information'


The best thing to do is uninstall the toolbar following the instructions here
http://about.ask.com/apn/toolbar/docs/default/faq/...

If you need the Ask Toolbar, reinstall the current version.

--
This answer is provided “as-is.” You bear the risk of using it.
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TiMow

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