TCP Initial Sequence Number Randomness

The ISNs used in TCP/IP sessions should be as random as possible in order to prevent attacks such as IP address spoofing and session hijacking. This patch improves the randomness of the Windows NT 4.0 TCP/IP ISN generation, providing 15 bits of entropy.

Affected Products

• Windows NT Server, Enterprise, Terminal Server and Workstation 4.0

Download

Patch: http://www.microsoft.com/Downloads/Release.asp?ReleaseID=16764

Further Details

Source: Microsoft Corporation

Reference: Microsoft Corporation

Updated: December 23, 1999

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