Microsoft Windows 2000/XP PPTP packet buffer overflow

win-pptp-packet-bo (10199) The risk level is classified as HighHigh Risk


Microsoft Windows 2000 and XP are vulnerable to a denial of service attack, caused by a buffer overflow in the Point-to-Point Tunneling Protocol (PPTP) service. By sending a specially-crafted PPTP packet to the PPTP service listening on port 1723, a remote attacker could overflow a buffer and cause the system to crash.

Note: It may also be possible to exploit this vulnerability to execute code on the system, although this has not been verified.


Denial of Service


For vulnerability detection:

Enable the following checks in the ISS Protection Platform:

For Virtual Patch:

Block or restrict the following in the ISS Protection Platform as appropriate to the environment:
Port 1723

For Manual Protection:

Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS02-063. See References.


Platforms Affected:

  • Microsoft Windows 2000
  • Microsoft Windows XP


Sep 26, 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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