Message-ID: <OFA456D239.8D8C8112-ON882574A3.0076E423-862574A3.007737A2@3com.com>
Date: Tue, 12 Aug 2008 16:42:11 -0500
From: zdi-disclosures@...m.com
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Cc: zdi-disclosures@...m.com
Subject: ZDI-08-048: Microsoft Excel COUNTRY Record Memory Corruption Vulnerability

ZDI-08-048: Microsoft Excel COUNTRY Record Memory Corruption Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-08-048
August 12, 2008

-- CVE ID:
CVE-2008-3006

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Office Excel

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6296. 
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 Office Excel. Exploitation
requires that the attacker coerce the target into opening a malicious
.XLS file.

The specific flaw exists within the parsing of the BIFF file format used
by Microsoft Excel. During the processing of a malformed Country (0x8c)
record, user-supplied data may be used in a memory copy operation
resulting in memory corruption.  If successfully exploited remote
control of the affected system can be obtained under the credentials of
the currently logged in 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/MS08-043.mspx

-- Disclosure Timeline:
2008-04-16 - Vulnerability reported to vendor
2008-08-12 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

-- About the Zero Day Initiative (ZDI):
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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

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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
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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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