Jon,
Thanks for the reply. This wasn't a question specific to any client.
However, in some cases in the past clients with very narrow external
exposure have asked for this kind of testing. Fragmentation,
Amplification, protocol & app attacks either weren't effective or the
client's existing countermeasures effective enough to handle the attacks
of those types above.
We're talking straight pipe vs. pipe DoS options. I'm not aware of any
"legitimate" botnets for this kind of load testing or service providers
which offer similar services so I was hoping to get some ideas/options.
On Mon, 2008-07-14 at 17:24 -0400, Jon Kibler wrote:
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Erin Carroll wrote:
> Pen-testers,
>
> There have been times when, during the course of a pen-test for a
> client, a request is made for DoS/DDoS attacks against external
systems
> & services. While there are resource exhaustion & other attack methods
> for certain services/systems, let's assume that Smurf-like attacks
> aren't viable. I'm curious for ideas or methods to simulate straight
> bandwidth DDoS attacks if the client pipe(s) are larger than your
> available pipe(s).
>
> It's not like we all have huge botnets in our back pocket... Has
anyone
> faced this situation before and if so, how did you manage?
>
Hi,
What services (e.g., IIS x.x, BIND v.e.r)?
What network infrastructure devices (e.g., Cisco xxxx w/ IOS yy.zz)?
What O/Ses / versions?
There are a number of protocol and device specific attacks where a
single to a few hosts with not much bandwidth can successful DoS a
system on a much larger pipe. Attacks are not available for every
environment, but there is usually just enough of a range of equipment
and services on most network to make a DoS attack against something on a
target network possible.
What to look for?
Fragmentation attacks (e.g., jolt)
Amplification attacks (e.g., DNS: request a VERY large TXT record)
Protocol attacks (e.g., LAND)
Application attacks (e.g., SQL Injection 'shutdown with nowait')
Where to look?
PacketStorm
Milw0rm
Just some starters. Give some specifics and I can be more specific.
Hope this helps!
Jon Kibler
- --
Jon R. Kibler
Chief Technical Officer
Advanced Systems Engineering Technology, Inc.
Charleston, SC USA
o: 843-849-8214
c: 843-224-2494
s: 843-564-4224
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