Johannes Ullrich from the SANS ISC sent this to me and then I saw it on
the DSHIELD list:

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If you run Solaris, please check if you got telnet enabled NOW. If you
can, block port 23 at your perimeter. There is a fairly trivial
Solaris telnet 0-day.

telnet -l "-froot" [hostname]

will give you root on many Solaris systems with default installs
We are still testing. Please use our contact form at
https://isc.sans.org/contact.html
if you have any details about the use of this exploit.
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You mean they still use telnet?!

Update from HD Moore:
"but this bug isnt -froot, its -fanythingbutroot =P"

On the exploits@ mailing list and on DSHIELD this vulnerability was
verified as real.

If Sun doesn't yet block port 23/tcp incoming on their /8, I'd make it a
strong suggestion.

Anyone else running Solaris?

Gadi.