10456 : Microsoft Windows IPv6 Packet Fragmentation Handling DoS
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Info

Last Modified
27 days ago

Percent Complete
95%

Disclosure
Sep 26, 2004

Discovery
Unknown

Dates

Exploit
Sep 26, 2004

Solution
Unknown

Description

 Microsoft Windows contains a flaw that may allow a remote denial of service. The issue is triggered when an attacker sends a large number of small packet fragments (with fragments missing) followed by repeatedly sending the final fragment. For each final packet, the system attempts to reassemble the entire packet and will allocate memory causing a high CPU load. This may result in loss of availability for the platform.

Classification

 Location: Remote/Network Access Required
Attack Type: Denial of Service
Impact: Loss of Availability
Exploit: Exploit Available

Technical

 High CPU utilization is caused by sending a large number of small fragments (with
fragments missing) then sending the final fragment repetitively. Each time
the last fragment is sent the CPU tries to reassemble the entire fragment
with the associated allocate / free memory for the size of the fragment.

Solution

 Currently, there are no known upgrades, patches, or workarounds available to correct this issue.

Products
Microsoft Corporation
Watch-list
Windows
Watch-list
 XP Pro SP1
XP Home SP1
2000 Pro
2000 Pro SP4
2000 Server SP3
2000 Server SP1
2000 Pro SP1
2000 Server
2000 Server SP4
2000 Server SP2
2000 Pro SP2
2000 Pro SP3
XP Pro
XP Home
XP Home SP2
XP Pro SP2
2000 Server SP1 Advanced
2000 Server Advanced
2000 Server SP2 Advanced
2000 Server SP3 Advanced
2000 Server Datacenter
2000 Server SP4 Advanced
2000 Server SP1 Datacenter
2000 Server SP2 Datacenter
2000 Server SP3 Datacenter
2000 Server SP4 Datacenter

References

Credit
  • Gandalf The White - gandalfBrand New Doo Doodigital.net -

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