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The Internet threat alert status is currently normal. At present, no major epidemics or other serious incidents have been recorded by Kaspersky Lab’s monitoring service. Internet threat level: 1

Microsoft Excel Two Vulnerabilities


Secunia ID

SA33954

CVE-ID

CVE-2009-0100, CVE-2009-0238

Release Date

24 Feb 2009

Last Change

15 Apr 2009

Criticality

Extremely Critical

Solution Status

Vendor Patch

Software

Microsoft Excel 2000
Microsoft Excel 2002
Microsoft Excel 2003
Microsoft Office 2000
Microsoft Office 2003 Professional Edition
Microsoft Office 2003 Small Business Edition
Microsoft Office 2003 Standard Edition
Microsoft Office 2003 Student and Teacher Edition
Microsoft Office 2004 for Mac
Microsoft Office 2007
Microsoft Office 2008 for Mac
Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats
Microsoft Office Excel 2007
Microsoft Office Excel Viewer 2003
Microsoft Office Excel Viewer 2007
Microsoft Office XP

Where

From remote

Impact
System access

This covers vulnerabilities where malicious people are able to gain system access and execute arbitrary code with the privileges of a local user.

Description

Two vulnerabilities have been reported in Microsoft Excel, which can be exploited by malicious people to compromise a user's system.

1) An error may cause an invalid object to be referenced when opening an Excel document and can be exploited via a specially crafted Excel spreadsheet file.

NOTE: According to Microsoft, the vulnerability is currently being actively exploited.

2) An error when processing an unspecified 16-bit value extracted from an Excel document can be exploited to corrupt memory.

Successful exploitation may allow execution of arbitrary code.

Solution

Apply patches.

Microsoft Office Excel 2000 SP3:
http://www.microsoft.com/downloads/details.aspx?familyid=3dc8b670-25a5-4f46-b7de-12bc693b628a

Microsoft Office Excel 2002 SP3:
http://www.microsoft.com/downloads/details.aspx?familyid=9a52bf4b-05f6-4b73-94b9-28ed7e20f86c

Microsoft Office Excel 2003 SP3:
http://www.microsoft.com/downloads/details.aspx?familyid=d9dbfa63-c0cb-4c84-9b8a-6e52568045b0

Microsoft Office Excel 2007 SP1:
http://www.microsoft.com/downloads/details.aspx?familyid=50d8630b-1365-4007-81a0-18c0d6d4b86e

Microsoft Office 2004 for Mac:
http://www.microsoft.com/downloads/details.aspx?familyid=52271140-89be-4b9c-baa2-cea09097d703

Microsoft Office 2008 for Mac:
http://www.microsoft.com/downloads/details.aspx?familyid=f6e407eb-11a5-433f-8006-4b822953ca98

Microsoft Office Excel Viewer 2003 SP3:
http://www.microsoft.com/downloads/details.aspx?familyid=c72e6087-b48f-4d2d-8366-01d9f5ff6b6c

Microsoft Office Excel Viewer 2007:
http://www.microsoft.com/downloads/details.aspx?familyid=58b3929c-5373-47a4-aa97-66d179758792

Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1:
http://www.microsoft.com/downloads/details.aspx?familyid=05f7c517-e551-4dcd-b24a-5d548f2d09cf

Reported by

1) Reported as a 0-day.
2) Haifei Li, Fortinet FortiGuard Global Security Research Team

Original Advisory

MS09-009 (KB968557, KB959964, KB959988, KB959995, KB959997, KB959993, KB960000, KB960003):
http://www.microsoft.com/technet/security/Bulletin/MS09-009.mspx

Microsoft:
http://www.microsoft.com/technet/security/advisory/968272.mspx

FortiGuard:
http://www.fortiguardcenter.com/advisory/FGA-2009-16.html