MSOE Javascript Execution Vulnerability

[Paul]

Note: This vulnerability as well as several more can be found at http://www.greyhats.cjb.net

Outlook Express Window Opener Script Execution Vulnerability

[Tested]
Microsoft Outlook Express version 6.0.2800.1123.
Microsoft Windows XP sp2

[Discussion]
Microsoft Outlook Express is prone to a vulnerability which will allow javascript to execute in the message window. Outlook Express uses a webbrowser control to view email messages, with all features except javascript, objects, and a couple more. Apparent
ly, it only filters out stuff in the window.document object. If something were to access any other components of the window object, it would be given as much access as if the mail message had been an html document opened in internet explorer.

The example presents the viewer with a link to a javascript page with the target set to "_blank" (opens the page in a new window). The javascript calls opener.execScript, displaying an alert with the message body's innerHTML.

[Example]
http://freehost07.websamba.com/greyh...execscript.htm

[Monu]

Hello,

Couldn't reproduce this on MSOE v6.0.2800.1123. Win2k SP4.

I get an "opener is null or not an object" javascript error when I
load the link from MSOE.

gr,
David

Paul wrote:
>
> Note: This vulnerability as well as several more can be found at http://www.greyhats.cjb.net
>
> Outlook Express Window Opener Script Execution Vulnerability
>
> [Tested]
> Microsoft Outlook Express version 6.0.2800.1123.
> Microsoft Windows XP sp2
>
> [Discussion]
> Microsoft Outlook Express is prone to a vulnerability which will allow javascript to execute in the message window. Outlook Express uses a webbrowser control to view email messages, with all features except javascript, objects, and a couple more. Appare
ntly, it only filters out stuff in the window.document object. If something were to access any other components of the window object, it would be given as much access as if the mail message had been an html document opened in internet explorer.
>
> The example presents the viewer with a link to a javascript page with the target set to "_blank" (opens the page in a new window). The javascript calls opener.execScript, displaying an alert with the message body's innerHTML.
>
> [Example]
> http://freehost07.websamba.com/greyh...execscript.htm

[Fabricio A. Angeletti]

Access Denied

Microsoft Outlook Express version 6.0.2800.1123.
Microsoft Windows XP sp1 (prof)

----- Original Message -----
From: "Paul" <paul@greyhats.cjb.net>
To: <bugtraq@securityfocus.com>
Sent: Sunday, July 11, 2004 12:59 PM
Subject: MSOE Javascript Execution Vulnerability


>
>
> Note: This vulnerability as well as several more can be found at
http://www.greyhats.cjb.net
>
> Outlook Express Window Opener Script Execution Vulnerability
>
> [Tested]
> Microsoft Outlook Express version 6.0.2800.1123.
> Microsoft Windows XP sp2
>
> [Discussion]
> Microsoft Outlook Express is prone to a vulnerability which will allow
javascript to execute in the message window. Outlook Express uses a
webbrowser control to view email messages, with all features except
javascript, objects, and a couple more. Apparently, it only filters out
stuff in the window.document object. If something were to access any other
components of the window object, it would be given as much access as if the
mail message had been an html document opened in internet explorer.
>
> The example presents the viewer with a link to a javascript page with the
target set to "_blank" (opens the page in a new window). The javascript
calls opener.execScript, displaying an alert with the message body's
innerHTML.
>
> [Example]
> http://freehost07.websamba.com/greyh...execscript.htm
>