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Insecure Library Loading
Highly critical

Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow

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Release Date:  2007-09-25    Last Update:  2007-09-28    Views:  32,586

Secunia Advisory SA26960

Where:

From remote

Impact:

System access

Solution Status:

Unpatched

Software:

CVE Reference(s):

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

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

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow

User Message
[+]

vpmigliore

RE: Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow
This reply has been minimised due to a negative Relevancy Score.
vpmigliore RE: Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow
Member 24th Oct, 2010 16:58
Score: -6
Posts: 5
User Since: 20th Oct 2010
System Score: N/A
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!!
Was this reply relevant?
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-1
ddmarshall RE: Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow
Dedicated Contributor 24th Oct, 2010 17:05
Score: 1172
Posts: 940
User Since: 8th Nov 2008
System Score: 100%
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

RE: Ask Toolbar ToolbarSettings ActiveX Control Buffer Overflow
[+]
This reply has been minimised due to a negative Relevancy Score.

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