Security Incidents mailing list archives

RE: CRv2 - Questions


From: "The Death" <thedeadh () netvision net il>
Date: Mon, 23 Jul 2001 17:01:35 +0200

Hello there.

IPv4 has 32 bit address space, and 2^32 == 4294967296. So there
are no more than 2^32 IPs and no need to have a PRNG to output
more - but the order of this 2^32 numbers plays a role. AFAIK the
first version produced the same order. This is not a PRNG but a
chain generator with the same output on every infected host.

You are right, i did not notice that the total number is covering the entire
possible 32-bit positions (therefore, all IPs). In any case, this IS
considered a PRNG, it is just that the seeding configurations (using static
seeds and not random seeds) break the security, and bring it to a level of a
simple, known, list.

Thanx for pointing that out, anyway.

Regards,
        The Death


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