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Date: Wed, 5 Aug 2009 12:44:36 -0500
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: FD <full-disclosure@...ts.grok.org.uk>,
	bugtraq <bugtraq@...urityfocus.com>
Cc: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
Subject: ZDI-09-047: Microsoft Internet Explorer getElementsByTagName Memory
 Corruption Vulnerability

ZDI-09-047: Microsoft Internet Explorer getElementsByTagName Memory
Corruption Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-047
August 5, 2009

-- CVE ID:
CVE-2009-1918

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Internet Explorer

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 8360.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Microsoft Internet Explorer. User
interaction is required to exploit this vulnerability in that the target
must visit a malicious page.

The specific flaw exists in the appending of elements to an invalid
object. When appending malformed elements to a empty DIV element memory
corruption can occur. A properly constructed web page can result in
remote code execution under the context of the current user.

-- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:

http://www.microsoft.com/technet/security/Bulletin/MS09-034.mspx

-- Disclosure Timeline:
2009-04-28 - Vulnerability reported to vendor
2009-08-05 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * wushi & ling of team509

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

    http://www.zerodayinitiative.com/advisories/disclosure_policy/

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