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  4. Attack: MS Excel Remote Code Exec 2

Attack: MS Excel Remote Code Exec 2

Severity: High

This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.

Description

This signature detects attempts to exploit a remote code execution vulnerability in specifically crafted Excel documents.

Additional Information

Microsoft Excel is a spreadsheet application that is part of the Microsoft Office suite.

Excel is prone to a remote code-execution vulnerability. This issue occurs when the application parses BIFF8 records that contain malformed column field data. An attacker could exploit this issue by crafting a malicious Excel file and enticing an unsuspecting user to open it.

The attacker could exploit this issue to execute arbitrary code with the privileges of the user running the application. The attacker could leverage the issue to compromise affected computers.

Affected

  • Microsoft Excel 2000 SP2, SP3
  • Microsoft Excel 2002 SP1, SP2, SP3
  • Microsoft Excel 2003 SP1, SP2
  • Microsoft Excel 2004 for Mac
  • Microsoft Excel Viewer 2003
  • Microsoft Excel x for Mac
  • Microsoft IIS
  • Microsoft Office 2000 SP1, SP2, SP3
  • Microsoft Office 2003 SP1, SP2
  • Microsoft Office XP SP1, SP2, SP3
  • Microsoft Works Suite 2004
  • Microsoft Works Suite 2005
  • Microsoft Works Suite 2006

Response

Microsoft has released a fix to address this issue. Please see the references section for more information.

Update: Microsoft has re-released MS07-002 to resolve a regression with the original Excel 2000 fixes when dealing with files created when in Korean, Chinese, or Japanese executable modes. Please see the knowledge base article (KB931183) for further information.
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