Microsoft Internet Explorer Gopher client malformed reply buffer overflow

ie-gopher-bo (9247) The risk level is classified as HighHigh Risk


The Gopher protocol is vulnerable to a buffer overflow in the built-in Gopher client. A remote attacker could exploit this vulnerability by creating a Web page or an HTML email that redirects a victim to a malicious Gopher server, which could be used to overflow a buffer in the code in Internet Explorer that handles Gopher replies. An attacker could use this vulnerability to execute arbitrary code and gain complete control of the victim's computer.


Gain Access


Apply the appropriate patch for your system, as listed in the latest Microsoft Security Bulletin. See References.

— OR —

Use Microsoft Automatic Update if it is supported by your operating system. The original bulletin issued by Microsoft has been superseded.


Platforms Affected:

  • Microsoft Internet Explorer 5.01
  • Microsoft Internet Explorer 5.5
  • Microsoft Internet Explorer 6.0
  • Microsoft ISA Server 2000
  • Microsoft Proxy Server 2.0


Jun 04, 2002

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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