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full-disclosure-uk: [Full-disclosure] ZDI-08-048: Microsoft Exce

[Full-disclosure] ZDI-08-048: Microsoft Excel COUNTRY Record Memory Corruption Vulnerability

From: <zdi-disclosures_at_nospam>
Date: Tue Aug 12 2008 - 21:42:11 GMT
To: full-disclosure@lists.grok.org.uk, bugtraq@securityfocus.com


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): 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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