Microsoft Excel BIFF file format buffer overflow

excel-biff-file-bo (33913) The risk level is classified as HighHigh Risk

Description:

Microsoft Excel is vulnerable to a stack-based buffer overflow, caused by improper handling of the Excel BIFF file format. By persuading a victim to open an Excel file containing a specially-crafted Named Graph record, a remote attacker could overflow a buffer and execute arbitrary code on the system with the privileges of the victim. An attacker could exploit this vulnerability by hosting the malicious file on a Web site or sending it to a victim as an email attachment.

*CVSS:

Base Score: 8
  Access Vector: Remote
  Access Complexity: High
  Authentication: Not Required
  Confidentiality Impact: Complete
  Integrity Impact: Complete
  Availability Impact: Complete
 
Temporal Score: 5.9
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Apply the appropriate patch for your system, as listed in the latest Microsoft Security Bulletin. See References.

— OR —

Use Microsoft Automatic Update if it is supported by your operating system. The original bulletin issued by Microsoft has been superseded.

References:

Platforms Affected:

  • Microsoft Excel 2000
  • Microsoft Excel 2002
  • Microsoft Excel 2003
  • Microsoft Excel Viewer 2003
  • Microsoft Office 2000 SP3
  • Microsoft Office 2003 SP2
  • Microsoft Office XP SP3
  • Microsoft Windows Vista

Reported:

May 08, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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