So yeah, including all the little shareware etc DNS implementations, plus
DJB's implementation, it's possible that the majority of implementations
numerically weren't affected (tho I'd doubt even that), but certainly, by
share, an overwhelming majority of users /were/ affected. And that's not
even counting all the stub resolvers, tho the exposure there was
effectively per-instance rather than per X-thousands. GLIBC, etc, all
that was affected, a good deal of the caching servers were affected, the
Linux based routers, most or all of them (including the non-glibc ones,
AFAIK) were affected, MS was affected there too, etc. So even those folks
depending on unaffected full resolvers were often at risk due to the stub
So a very large share of the Internet using public was affected at some
level, either from their full DNS server or at the stub-resolver (possibly
at multiple levels there too) level, with a good many affected at multiple
This is why it was such a big deal. They say it's a big deal when you
actually know someone affected, but this was far larger than that, since
/most/ of the people /everyone/ knew, were affected at at least one level,
many at multiple levels. The SDC and WHO are predicting something like
30-40% swine flu coverage within two years if the vaccines don't stop it.
Luckily it's not fatal for most, just seriously uncomfortable for awhile,
and fatal for a few. (Some have theorized that's one of the reasons it's
pandemic, people aren't actually dying, and are apparently still
contagious a week after they're feeling better, thus allowing it to spread
much more efficiently while bumping down the urgency of guarding against
it.) That makes it a reasonable analogy for the Kaminsky DNS issue, but
bump those rates to 80-90% exposure, possibly more (I actually saw a
figure of 97% somewhere, again, considering all levels, so 80-90% may be
conservative), and that's what they were looking at. That's not just big,
it's apocalyptic in scale, so big that even a single percent kill rate is
a very large number of people!
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