Pi3Web HTTP Server long CGI parameter buffer overflow

pi3web-long-parameter-bo (7880) The risk level is classified as LowLow Risk


Pi3Web HTTP Server is vulnerable to a denial of service attack, caused by a buffer overflow in the handling of CGI parameters. By sending several URL requests containing overly long CGI parameter values, a remote attacker can overflow a buffer and cause the Web server to crash. The server must be restarted to regain normal functionality.


Denial of Service


Upgrade to the latest version of Pi3Web (2.0.0 or later), available from the SourceForge Web site. See References.


  • BugTraq Mailing List, Sun Jan 13 2002 - 17:00:39 CST: Pi3Web Webserver v2.0 Buffer Overflow Vulnerability.
  • Pi3.org Home Page: Welcome to Pi3.org.
  • SourceForge.net: [ 505583 ] Security patch 2 for Pi3Web 2.0 beta 2.
  • SourceForge.net: CGI buffer overflow vulnerability.
  • BID-3866: John Roy Pi3Web For Windows Long Request Buffer Overflow Vulnerability
  • CVE-2002-0142: CGI handler in John Roy Pi3Web for Windows 2.0 beta 1 and 2 allows remote attackers to cause a denial of service (crash) via a series of requests whose physical path is exactly 260 characters long and ends in a series of . (dot) characters.
  • OSVDB ID: 5777: Pi3Web CGI Handler Long Parameter Handling Overflow

Platforms Affected:

  • Holger Zimmermann and John Roy Pi3Web 2.0


Jan 14, 2002

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