Re: Buffer overflow in Nmap when using -ox - on a /8 scan

[Henri Doreau <henri.doreau () gmail com>]

Hi,

2014-01-25 Jacek Wielemborek <d33tah () gmail com>:
> Hi,
>
> I just found a potentially interesting error. While experimenting with Nmap, I
> managed to get this strange error on Nmap 6.40 from Fedora 20:
>
> [22:46:39][/tmp][134] $ nmap localhost/8 --min-rate 100000  -ox - -sT
> [...]
Huh?! What is "-sT --min-rate 100000"?

It looks like the error comes from FD_ISSET, because you forced nmap
to open sockets beyond FD_SETSIZE. What we could have is a
CHECKED_FD_ISSET, that would abort() just like CHECK_FD_SET if the
socket # is greater than FD_SETSIZE. That would make the crash a bit
nicer but wouldn't essentially change anything...


Regards

-- 
Henri
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