Re: IPv6 OS fingerprinting crashes on Ubuntu/Debian with UFW enabled

[Daniel Miller <bonsaiviking () gmail com>]

On Thu, Aug 14, 2014 at 2:35 PM, Fyodor <fyodor () nmap org> wrote:

> Is Nmap itself actually crashing/quitting?  If so, then I think we should
> at least handle this more gracefully.  Printing a useful warning message is
> fine, and probably desirable to help us track this issue.  I guess
> continuing with OS detection without that probe seems reasonable, though in
> that case we should probably mark the fingerprints as not good so we don't
> ask the user to submit them.
Yes, Nmap was quitting with pfatal at this point. r33619 should allow it to
continue, but marks the whole fingerprint as "incomplete" which prevents it
from being suggested for submission. The fix was a bit more invasive than I
would have wished (new bool members for FingerPrintResults and FPHost), but
it should work no matter what probe fails to be sent. The error message
regarding the contents of the probe is still presented, just changed to not
be fatal, so we can debug these issues in the future if necessary.

Dan
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