Message-ID: <OFFF1B3459.7F791B42-ON88257337.006B7D03-88257337.0070B91C@3com.com>
Date: Tue, 14 Aug 2007 13:31:15 -0700
From: zdi-disclosures@...m.com
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	vulnwatch@...nwatch.org, vulndiscuss@...nwatch.org
Subject: ZDI-07-046: Microsoft Windows Media Player Skin
 Parsing Size Mismatch Heap Overflow Vulnerability

ZDI-07-046: Microsoft Windows Media Player Skin Parsing Size Mismatch
            Heap Overflow Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-07-046.html
August 14, 2007

-- CVE ID:
CVE-2007-3037

-- Affected Vendor:
Microsoft

-- Affected Products:
Windows Media Player 7.1
Windows Media Player 9
Windows Media Player 10
Windows Media Player 11

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since August 14, 2007 by Digital Vaccine protection
filter ID 5535. For further product information on the TippingPoint IPS:

    http://www.tippingpoint.com 

-- Vulnerability Details:
This vulnerability allows attackers to execute arbitrary code on
vulnerable installations of Microsoft Windows Media Player. User
interaction is required to exploit this vulnerability in that the
target must visit a malicious page or open a malicious file.

The specific flaw exists during the parsing of malformed skin files
(WMZ). A size compressed / decompressed size mismatch can result in an
under allocated heap buffer which can be leveraged by an attacker to
eventually execute arbitrary code 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/MS07-047.mspx

-- Disclosure Timeline:
2007.03.19 - Vulnerability reported to vendor
2007.08.14 - Digital Vaccine released to TippingPoint customers
2007.08.14 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by Piotr Bania.

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, a division of 3Com, 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.
3Com does not re-sell the vulnerability details or any exploit code.
Instead, upon notifying the affected product vendor, 3Com 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, 3Com provides this vulnerability
information confidentially to security vendors (including competitors)
who have a vulnerability protection or mitigation product.


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