Microsoft Windows 2000/XP PPTP packet buffer overflow
| win-pptp-packet-bo (10199) |  High Risk |
Description:
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.
Consequences:
Denial of Service
Remedy:
For vulnerability detection:
Enable the following checks in the ISS Protection Platform:
WinPptpPacketBo
MS02-063
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.
References:
- BugTraq Mailing List, Thu Sep 26 2002 - 04:43:46 CDT: Microsoft PPTP Server and Client remote vulnerability .
- Immunity Web site: Immunity Home Page.
- Microsoft Security Bulletin MS02-063: Unchecked Buffer in PPTP Implementation Could Enable Denial of Service Attacks (Q329834).
- BID-5807: Microsoft PPTP Server Buffer Overflow Vulnerability
- CVE-2002-1214: Buffer overflow in Microsoft PPTP Service on Windows XP and Windows 2000 allows remote attackers to cause a denial of service (hang) and possibly execute arbitrary code via a certain PPTP packet with malformed control data.
- OSVDB ID: 13422: Microsoft Windows PPTP Service Malformed Control Data Overflow
Platforms Affected:
- Microsoft Windows 2000
- Microsoft Windows XP
Reported:
Sep 26, 2002
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