Published:2009/09/09  Last Updated:2009/09/10

Buffer overflow vulnerability in Microsoft Windows


Microsoft Windows contains a buffer overflow vulnerability.

Products Affected

  • Microsoft Windows 2000
  • Windows XP
  • Windows XP Professional x64 Edition
  • Windows Server 2003
  • Windows Server 2003 x64 Edition
  • Windows Vista
  • Windows Vista x64 Edition
  • Windows Server 2008
  • Windows Server 2008 for x64-based Systems


Windows Media Format Runtime included in Microsoft Windows contains a buffer overflow vulnerability when parsing specific files.


If a user opens a specially crafted file, an attacker may execute arbitrary code.


Update the software
Apply the update according to the information provided by Microsoft.


  1. IPA
    Security Alert for Vulnerability in Microsoft Windows

JPCERT/CC Addendum

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

Vulnerability Analysis by JPCERT/CC

Analyzed on 2009.09.09 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


Hiroshi Noguchi of Alice Carroll fan club reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert JPCERT-AT-2009-0018
September 2009 Microsoft Security Bulletin (five critical patches)
JPCERT Reports
CERT Advisory Technical Cyber Security Alert TA09-251A
Microsoft Updates for Multiple Vulnerabilities
CPNI Advisory
CVE CVE-2009-2498
JVN iPedia JVNDB-2009-000059

Update History

Information under the section "References" has been added.