1. Symantec/
  2. Security Response/
  3. Attack Signatures/
  4. HTTP Excel MSO Remote Code Exec

HTTP Excel MSO Remote Code Exec

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 malformed Excel file which is vulnerable to remote code execution.

Additional Information

Microsoft Office is prone to a remote code-execution vulnerability. This issue occurs when the application processes maliciously crafted files.

This issue is currently being exploited via Excel files (.xls), but other Office applications may also be vulnerable.

An attacker could exploit this issue by enticing a victim into opening a malicious Office file. If the vulnerability is successfully exploited, this could result in the execution of arbitrary code in the context of the currently logged-in user.

Affected

  • Microsoft Office 2000 Service Pack 3
  • Microsoft Access 2000
  • Microsoft Excel 2000
  • Microsoft FrontPage 2000
  • Microsoft Outlook 2000
  • Microsoft PowerPoint 2000
  • Microsoft Publisher 2000
  • Microsoft Word 2000
  • Microsoft Office XP Service Pack 3
  • Microsoft Access 2002
  • Microsoft Excel 2002
  • Microsoft FrontPage 2002
  • Microsoft Outlook 2002
  • Microsoft PowerPoint 2002
  • Microsoft Publisher 2002
  • Microsoft Visio 2002
  • Microsoft Word 2002
  • Microsoft Office 2003 Service Pack 1
  • Microsoft Access 2003
  • Microsoft Excel 2003
  • Microsoft Excel 2003 Viewer
  • Microsoft FrontPage 2003
  • Microsoft InfoPath 2003
  • Microsoft OneNote 2003
  • Microsoft Outlook 2003
  • Microsoft PowerPoint 2003
  • Microsoft Project 2003
  • Microsoft Publisher 2003
  • Microsoft Visio 2003
  • Microsoft Word 2003
  • Microsoft Excel 2003 Viewer
  • Microsoft Word 2003 Viewer
  • Microsoft Project 2000 Service Release 1
  • Microsoft Project 2002 Service Pack 1
  • Microsoft Visio 2002 Service Pack 2
  • Microsoft Office 2004 for Mac

Response

Ensure that all patches released by Microsoft have been applied.
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