"Todd Towles" <toddtowles@brookshires.com> writes:
Patrick is right, Red Hat will patch services but doesn't change the
default version number in their banners. That way, you don't really know
what level a service is, if you are trying to attack it.
I did a "rpm -q OpenSSH" and it came back with a older version. Maybe it
was patched and I couldn't tell..it is possible. But I know for sure I
I can't remember the term for this process (patching without changing
the presented version) but I do know that RH does it.
% rpm -q kernel
kernel-2.4.22-1.2188.nptl
2.4.22 is the kernel version that was used as the base
1.2188 is a number that presumably means something to someone at Red Hat.
Redhat tend to backport security fixes into their current version -
this is done for stability reasons. When they do this, they rev the
number after the last '-', e.g. as in openssh-3.6.1p2-19.
This is a cool trick but in my mind it doesn't protect you very
much.
It does protect you - the fix is there, but it does mean you get
e.g. nessus reporting openssh as vulnerable when it's not.
--
James Riden / j.riden@massey.ac.nz / Systems Security Engineer
GPG public key available at: http://www.massey.ac.nz/~jriden/
This post does not necessarily represent the views of my employer.
------------------------------------------------------------------------------
Ethical Hacking at the InfoSec Institute. All of our class sizes are
guaranteed to be 12 students or less to facilitate one-on-one interaction
with one of our expert instructors. Check out our Advanced Hacking course,
learn to write exploits and attack security infrastructure. Attend a course
taught by an expert instructor with years of in-the-field pen testing
experience in our state of the art hacking lab. Master the skills of an
Ethical Hacker to better assess the security of your organization.
http://www.infosecinstitute.com/courses/ethical_hacking_training.html
-------------------------------------------------------------------------------
