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SubjectRe: predictable IP ID
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> But then Andrey proved that it is really serious problem.
> Essentially, the exploit is very simple: predictable ID allows
> spoofer to detect situation, when kernel answers to source spoofed packet.
> F.e. it opens nice and fast (64 packets!) way to complete
> tcp connection with spoofed source. It is very serious hole.

Im unconvinced. Where is the exploit documented ? If the exploit relies
on overwriting the tcp header remember that even the base firewall config
doesn't allow this.

> Certainly, AVL is terrible but taking into account that size of database
> may be huge, it is acceptable. Also, take into account that
> the same code may be used to kill timewait state, so that it is pure winning.

Except that I construct attacks to use massive amounts of AVL tree space.
Very easily in fact. On something like an appliance with 8Mb of RAM that
makes the AVL setup a non solution and something better is needed

Alan


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