Microsoft Outlook Express Security Domain Flaw Lets Remote Users Silently Install and Execute Arbitrary Code
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SecurityTracker Alert ID: 1006148 |
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Feb 22 2003
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Impact: Execution of arbitrary code via network, User access via network
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Exploit Included: Yes
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Version(s): 6.00
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Description: A vulnerability was reported in Microsoft Outlook Express. A remote user can send a specially crafted HTML-based e-mail or newsgroup
posting to cause arbitrary code to be silently installed and executed on the target user's computer when the target user views the
message.
It is reported that this flaw may be related to the flaw originally reported in March 2002 in Microsoft Bulletin MS02-015 and affecting
Internet Explorer (see Alert ID 1003915 or CVE Number CAN-2002-0078). According to the report, the patches related to MS02-015
should prevent this newly reported vulnerability, but do not.
The report states that, if an e-mail or newsgroup is read by the target user
in the "Internet Zone", the demonstration exploit shown below will be effective:
<xml id=oExec> <security><exploit> <![CDATA[
<object id="oFile"
classid="clsid:11111111-1111-1111-1111"
codebase="C:\WINDOWS\FTP.EXE"></object>]]></exploit></security></xml>
<SPAN
dataFld=exploit dataFormatAs=html
dataSrc=#oExec></SPAN>
The demonstration exploit (credited to Grey Magic) will open an existing
binary on the target user's computer. However, the report states that Outlook Express will create a temporary file in the Internet
Explorer cache and the report implies that [but does not confirm that] arbitrary code could be delivered via this temporary file.
It
is reported that default installations of Outlook Express 6.00 are configured in the "Restricted Zone".
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Impact: A remote user can cause arbitrary code to be delivered to and executed on a target user's computer when the target user views the affected message, depending on the security zone settings for Outlook Express.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.microsoft.com/technet/security/ (Links to External Site)
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Cause: Access control error, State error
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Underlying OS: Windows (Any)
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Reported By: "http-equiv@excite.com" <http-equiv@malware.com>
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Message History:
None.
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Source Message Contents
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Date: Sat, 22 Feb 2003 14:41:09 -0000
From: "http-equiv@excite.com" <http-equiv@malware.com>
Subject: [Full-Disclosure] O UTLO OK EXP RE SS 6 .00 : broken
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Saturday, February 22, 2003
Technical silent delivery and installation of an executable no client
input other than reading an email or viewing a newsgroup message.
Outlook Express 6.00 SP1 Cumulative Pack 1 2 3 4 whatever.
This should not be possible.
When viewing an email message or a newsgroup message, Outlook Express
creates a temp file in the Internet Explorer cache. From here
security should be governed by Internet Explorer's security settings.
In an html email with internet zone applied, this will not function:
<object classid="clsid:11111111-1111-1111-1111"
codebase="C:\WINDOWS\FTP.EXE"></object>
[screen shot: http://www.malware.com/tsktsk.png 11KB]
In an html email message or newsgroup message with internet zone
applied this will function:
<xml id=oExec> <security><exploit> <![CDATA[ <object id="oFile"
classid="clsid:11111111-1111-1111-1111"
codebase="C:\WINDOWS\FTP.EXE"></object>]]></exploit></security><
/xml>
<SPAN dataFld=exploit dataFormatAs=html
dataSrc=#oExec></SPAN>
courtesy of: http://sec.greymagic.com/adv/gm001-ie/
[screen shot: http://www.malware.com/tsktsktsk.png 11KB]
NOTE: that default installations of Outlook Express 6.00 are with
restricted zone applied. However there still remain many 'happy
people' out there that enjoy their html mail messages and html
newsgroup messages, and coupling the above with any one of a million
other unsolved problems now and in the future with Internet Explorer
and Outlook Express, including a new
http://www.malware.com/stench.html we are back in business.
Notes: This is supposed to be patched:
http://microsoft.com/technet/security/bulletin/MS02-015.asp 28 March
2002
Keywords: experts Academic Advisory Board Think Tank security concepts
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