ZDI-08-048: Microsoft Excel COUNTRY Record Memory Corruption Vulnerability

From: zdi-disclosures@3com.com
To: full-disclosure@lists.grok.org.uk,bugtraq@securityfocus.com
Cc: zdi-disclosures@3com.com
Subject: ZDI-08-048: Microsoft Excel COUNTRY Record Memory Corruption Vulnerability
Date:


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

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