IP fragment reassembly denial of service
| ip-fragment-reassembly-dos (4518) |  Medium Risk |
Description:
Windows and BeOS are vulnerable to a denial of service attack, caused by a flaw in each operating system's method of IP fragment reassembly. A remote attacker could send a continuous stream of identical, fragmented IP packets to consume most or all of the operating system's CPU resources. This attack is sometimes called the Jolt2 attack.
Consequences:
Denial of Service
Remedy:
Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS00-029, MS01-033, MS01-041, MS01-044 or MS02-001. See References.
For Windows NT Server 4.0, Terminal Server Edition:
Microsoft originally provided a patch for this vulnerability in MS00-029, but it has been superseded by the patch released with MS01-033, which has been superseded by the patch released with MS02-018. See References.
For Windows NT 4.0:
Microsoft originally provided patches for this vulnerability in MS00-029 ,MS01-033, MS01-041, and MS02-001, but they have been superseded by the Security Roll-up patch released with MS02-018. See References.
For Windows 2000:
Microsoft originally provided a patch for this vulnerability in MS01-033, but it has been superseded by the patch released with MS02-001. See References.
References:
- BindView RAZOR Security Advisory, May 19, 2000: Jolt2 - Remote Denial of Service attack against Windows 2000, NT4, and Win9x.
- BugTraq Mailing List, Fri May 26 2000 - 06:18:13 CDT: Analysis of jolt2.c (MS00-029).
- BugTraq Mailing List, Fri May 26 2000 - 08:18:38 CDT: Addendum: Analysis of jolt2.c (MS00-029).
- Microsoft Knowledge Base Article 259728: Windows Hangs with Fragmented IP Datagrams.
- Microsoft Security Bulletin MS00-029: Patch Available for 'IP Fragment Reassembly' Vulnerability.
- Microsoft Security Bulletin MS01-033: Unchecked Buffer in Index Server ISAPI Extension Could Enable Web Server Compromise.
- Microsoft Security Bulletin MS01-041: Malformed RPC Request Can Cause Service Failure.
- Microsoft Security Bulletin MS01-044: 15 August 2001 Cumulative Patch for IIS.
- Microsoft Security Bulletin MS02-001: Trusting Domains Do Not Verify Domain Membership of SIDs in Authorization Data.
- Microsoft Security Bulletin MS02-018: Cumulative Patch for Internet Information Services (Q319733).
- BID-1236: Multiple Vendor Fragmented IP Packets DoS Vulnerability
- CVE-2000-0305: Windows 95, Windows 98, Windows 2000, Windows NT 4.0, and Terminal Server systems allow a remote attacker to cause a denial of service by sending a large number of identical fragmented IP packets, aka jolt2 or the IP Fragment Reassembly vulnerability.
Platforms Affected:
- Be Incorporated BeOS 5.0
- Microsoft Windows 2000
- Microsoft Windows 98
- Microsoft Windows 98SE
- Microsoft Windows Me
- Microsoft Windows NT 4.0
Reported:
May 19, 2000
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.
For corrections or additions please email xforce@iss.net