Avirt SOHO, Gateway, and Gateway Suite HTTP proxy buffer overflow

avirt-http-proxy-bo (7916) The risk level is classified as HighHigh Risk


Avirt SOHO, Gateway, and Gateway Suite is vulnerable to a buffer overflow in the HTTP proxy, caused by improper bounds checking of header fields in HTTP GET requests. By sending a specially-crafted GET request containing a header field of over 2319 bytes to the HTTP proxy service, a remote attacker could overflow a buffer and crash the system or execute arbitrary code on the system with elevated privileges.


Gain Access


No remedy available as of September 1, 2014.


  • Avirt Web site: Avirt Internet Sharing.
  • Strumpf Noir Society Advisory January 17, 2002: Avirt Proxy Buffer Overflow Vulnerabilities.
  • BID-3904: Avirt Gateway Suite HTTP Proxy Remote Buffer Overflow Vulnerability
  • BID-3905: Avirt Gateway Suite Telnet Proxy Remote Buffer Overflow Vulnerability
  • CVE-2002-0133: Buffer overflows in Avirt Gateway Suite 4.2 allow remote attackers to cause a denial of service and possibly execute arbitrary code via (1) long header fields to the HTTP proxy, or (2) a long string to the telnet proxy.

Platforms Affected:

  • Inari Avirt Gateway 4.2
  • Inari Avirt Gateway Suite 4.2
  • Inari Avirt SOHO 4.2


Jan 17, 2002

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