From: X-Force (xforceiss.net)
Date: Tue Jun 14 2005 - 12:44:02 CDT

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Internet Security Systems Protection Brief
June 14, 2005

Internet Explorer PNG Overflow

Summary:

ISS has shipped protection for a flaw X-Force has discovered in the PNG
image processing library used in software such as Microsoft's Internet
Explorer web browser. By crafting a PNG file in a malicious manner, an
attacker is able to trigger a heap overflow within Internet Explorer,
leading to arbitrary code execution and remote compromise.

Business Impact:

Compromise of networks and machines using affected versions of Internet
Explorer may lead to exposure of confidential information, loss of
productivity, and further network compromise. An attacker would be required
to cause a user to view a malicious website or email containing a
maliciously crafted image. Successful exploitation would grant an attacker
the privileges of the user viewing the image, up to and including
administrative privileges.

For the complete X-Force Protection Advisory, please visit:
http://xforce.iss.net/xforce/alerts/id/196

______

Internet Security Systems, Inc. (ISS) is the trusted expert to global
enterprises and world governments, providing products and services
that protect against Internet threats. An established world leader
in security since 1994, ISS delivers proven cost efficiencies and
reduces regulatory and business risk across the enterprise for
more than 11,000 customers worldwide. ISS products and services
are based on the proactive security intelligence conducted by ISS.
X-Force® research and development team . the unequivocal world
authority in vulnerability and threat research. Headquartered
in Atlanta, Internet Security Systems has additional operations
throughout the Americas, Asia, Australia, Europe and the Middle East.

Copyright (c) 2005 Internet Security Systems, Inc. All rights reserved
worldwide.

This document is not to be edited or altered in any way without the
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Disclaimer: The information within this paper may change without notice.
Use of this information constitutes acceptance for use in an AS IS
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information.

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Please send suggestions, updates, and comments to:
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