Pi3Web HTTP Server long CGI parameter buffer overflow

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

Description:

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.


Consequences:

Denial of Service

Remedy:

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

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

Reported:

Jan 14, 2002

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