If someone was going to plant a backdoor in Solaris, don't you think they
would have chosen a service that most people would leave turned on? The only
way I can see someone choosing telnet for a backdoor is if it happened a
looooong time ago. So, two things I'm curious about, but too busy (lazy) at
the moment to look up:
1. Didn't Sun open up the source to Solaris? I wonder if it looks more like
a bug or a backdoor in the source.
2. Did this get reintroduced to Solaris, or has it been there ever since the
legacy code was pulled over from SysV?
--Adrian
P.S. - Apologies if this was answered somewhere, and I missed it.
On 2/13/07, Gadi Evron <ge@linuxbox.org> wrote:
On Mon, 12 Feb 2007, Oliver Friedrichs wrote:
>
> Am I missing something? This vulnerability is close to 10 years old.
> It was in one of the first versions of Solaris after Sun moved off of
> the SunOS BSD platform and over to SysV. It has specifically to do with
> how arguments are processed via getopt() if I recall correctly.
Hey Oliver! :)
Well than, I guess it just became new again. And to be honest, I have to
agree with a previous poster and suspect (only suspect) it could somehow
be a backdoor rather than a bug.
The reason why this vulnerability is so critical is the number of networks
and organizations which rely on Solaris for critical production servers,
as well as use telnet for internal communication on their LAN (now how
smart is that? I'd rather use telnet on the Internet than on a local LAN).
Further, there are quite a few third party appliances (some
infrastructure back-end) that can not easily be patched running on
Solaris (forget fuzzing or VA, people never even NMAP appliances they
buy).
I am unsure of how long we will see this in to-do items of corporate
security teams around the world, but I am sure Sun's /8 is getting a lot
of action recently.
>
> Oliver
Gadi.
>
> -----Original Message-----
> From: Gadi Evron [mailto:ge@linuxbox.org]
> Sent: Sunday, February 11, 2007 10:01 PM
> To: bugtraq@securityfocus.com
> Cc: full-disclosure@lists.grok.org.uk
> Subject: Solaris telnet vulnberability - how many on your network?
>
> Johannes Ullrich from the SANS ISC sent this to me and then I saw it on
> the DSHIELD list:
>
> ----
> 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.
> ----
>
> 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.
>
>
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