Published:2009/06/11  Last Updated:2009/06/11

Buffer overflow vulnerability in Microsoft Works converters


Microsoft Works converters contain a buffer overflow vulnerability.

Products Affected

  • Microsoft Office 2000 Service Pack 3
  • Microsoft Office XP Service Pack 3
  • Microsoft Office 2003 Service Pack 3
  • 2007 Microsoft Office System Service Pack 1
  • Microsoft Works 8.5
  • Microsoft Works 9
For more information, refer to Microsoft's website.


Microsoft Works converters contain a buffer overflow vulnerability when processing Works (.wps) files.


If a user opens a malicious Works file, an attacker may execute arbitrary code.


Update the software
Update to latest version according to the information provided by Microsoft.


  1. IPA
    Security Alert for Vulnerability in Microsoft Works Converter

JPCERT/CC Addendum

The security update for this vulnerability is contained in the Microsoft Security Bulletin Summary for June 2009.

Vulnerability Analysis by JPCERT/CC

Analyzed on 2009.06.11 Critical

Measures Conditions Severity
Access Required Routed - can be attacked over the Internet using packets
  • High
Authentication None - anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required Simple - the user must be convinced to take a standard action that does not feel harmful to most users, such as click on a link or view a file
  • Medium
Exploit Complexity Low-Medium - some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)
  • Medium-High

Description of each analysis measures


Yuji Ukai of Fourteenforty Research Institute, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert JPCERT-AT-2009-0011
June 2009 Microsoft Security Bulletin (including six critical patches)
JPCERT Reports
CERT Advisory Technical Cyber Security Alert TA09-160A
Microsoft Updates for Multiple Vulnerabilities
CPNI Advisory
CVE CVE-2009-1533
JVN iPedia JVNDB-2009-000039

Update History