Microsoft Internet Explorer Malformed IFRAME Remote Buffer Overflow Vulnerability



Date Discovered

October 24, 2004


Microsoft Internet Explorer is reported prone to a remote buffer overflow vulnerability. This issue presents itself due to insufficient boundary checks performed by the application and results in arbitrary code execution or a denial of service. This issue does not affect the following Internet Explorer 6 versions: - Internet Explorer 6 for Windows Server 2003 - Internet Explorer 6 for Windows Server 2003 64-Bit Edition and Windows XP 64-Bit Edition Version 2003 - Internet Explorer 6 for Windows XP Service Pack 2

Technologies Affected

  • Avaya DefinityOne Media Servers
  • Avaya DefinityOne Media Servers R10
  • Avaya DefinityOne Media Servers R11
  • Avaya DefinityOne Media Servers R12
  • Avaya DefinityOne Media Servers R6
  • Avaya DefinityOne Media Servers R7
  • Avaya DefinityOne Media Servers R8
  • Avaya DefinityOne Media Servers R9
  • Avaya IP600 Media Servers
  • Avaya IP600 Media Servers R10
  • Avaya IP600 Media Servers R11
  • Avaya IP600 Media Servers R12
  • Avaya IP600 Media Servers R6
  • Avaya IP600 Media Servers R7
  • Avaya IP600 Media Servers R8
  • Avaya IP600 Media Servers R9
  • Avaya Modular Messaging S3400
  • Avaya S3400 Message Application Server
  • Avaya S8100 Media Servers
  • Avaya S8100 Media Servers R10
  • Avaya S8100 Media Servers R11
  • Avaya S8100 Media Servers R12
  • Avaya S8100 Media Servers R6
  • Avaya S8100 Media Servers R7
  • Avaya S8100 Media Servers R8
  • Avaya S8100 Media Servers R9
  • Microsoft Internet Explorer 6.0
  • Microsoft Internet Explorer 6.0 SP1


Run all software as a nonprivileged user with minimal access rights.
Running the client browser as a user with the minimal amount of privileges can reduce the impact of latent vulnerabilities.

Do not accept or execute files from untrusted or unknown sources.
Users should refrain from opening or executing files originating from untrusted or unknown sources.

Do not follow links provided by unknown or untrusted sources.
An attacker may supply a link to a malicious Web site that is designed to trigger this issue. Users should refrain from following links that originate from untrusted sources.

Avaya has released an advisory that acknowledges this vulnerability for Avaya products. Avaya advise that customers follow the Microsoft recommendations to address this issue. Please see the referenced Avaya advisory at the following location for further details: Microsoft Internet Explorer 6 Service Pack 2 is not prone to this vulnerability. If applicable, customers are advised to apply this service pack in order to mitigate the risk of exposure. Microsoft has released a security bulletin that provides fixes for this issue on supported versions of the operating system. This bulletin also includes update rollup 889669 fixes for corporate users or users that have received hotfixes for Internet Explorer 6 SP1 after the release of bulletin MS04-004.



This issue was reported by ned <> and Berend-Jan Wever <>.

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