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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


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Vulnerability Assessment Details

Relative IP Identification number change

Vulnerability Assessment Summary
Relative IP Identification number change

Detailed Explanation for this Vulnerability Assessment

The remote host uses non-random IP IDs, that is, it is
possible to predict the next value of the ip_id field of
the ip packets sent by this host.

A possible hacker may use this feature to acertain traffic patterns
within your network. A few examples (not at all exhaustive) are:

1. A remote attacker can acertain if the remote host sent a packet
in reply to another request. Specifically, a possible hacker can use your
server as an unwilling participant in a blind portscan of another
network.

2. A remote attacker can roughly acertain server requests at certain
times of the day. For instance, if the server is sending much more
traffic after business hours, the server may be a reverse proxy or
other remote access device. A possible hacker can use this information to
concentrate his/her efforts on the more critical machines.

3. A remote attacker can roughly estimate the number of requests that
a web server processes over a period of time.


Solution : Contact your vendor for a patch
Network Security Threat Level: Low

Networks Security ID:

Vulnerability Assessment Copyright: This script is Copyright (C) 1999 SecuriTeam

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