Blog
BlackHat Write-up: go-derper and mining memcaches
[Update: Disclosure and other points discussed in a little more detail here.]
Why memcached? At BlackHat USA last year we spoke about attacking cloud systems, while the thinking was broadly applicable, we focused on specific providers (overview). This year, we continued in the same vein except we focused on a particular piece of software used in numerous large-scale application including many cloud services. In the realm of “software that enables cloud services”, there appears to be a handful of “go to” applications that are consistently re-used, and it’s curious that a security practitioner’s perspective has not as yet been applied to them (disclaimer: I’m not aware of parallel work).
Go-derper: mining your memcacheds
Today at BlackHat USA 2010 we released a tool for manipulating memcached instances; we still need to write it up properly but here’s a link to the tool for the moment.
tl;dr: if you find a memcached, you can dump the cache and manipulate entries in the cache.
HTTP Methods per Directory
A very common finding in our day to day vulnerability management endevours is the HTTP Methods Per Directory.
In its most basic form, HackRack will determine which HTTP methods are allowed on various web or CGI directories by calling the OPTIONS methods per directory. On its own it is not always significant but as soon as you have directories that allow for PUT or DELETE, and weak directory permissions are in place, the picture can become much more colourful.
SensePost Corporate Threat(Risk) Modeler
Since joining SensePost I’ve had a chance to get down and dirty with the threat modeling tool. The original principle behind the tool, first released in 2007 at CSI NetSec, was to throw out existing threat modeling techniques (it’s really attack-focused risk) and start from scratch. It’s a good idea and the SensePost approach fits nicely between the heavily formalised models like Octave and the quick-n-dirty’s like attack trees. It allows fairly simple modeling of the organisation/system to quickly produce an exponentially larger list of possible risks and rank them.
New SensePost Website – check it out
Sigh. We’ve never been much good at marketing or advertising, and I guess we still aren’t. But we have tried to give our old website a bit of a face-lift, and it’s starting to feel like we’re finally making some progress.
Certainly most of the content is new and accurate and and certainly its much more comprehensive than our previous one. We’ve also gone to some effort to implement a more user-friendly CMS that will allow us to keep the content more current and interesting.
SensePost’s Training @ Black Hat Vegas ’10 (win something)
After hearing our talk was accepted at BlackHat, we’re happy to announce that our training will be back for it’s 9th straight run. Speaking of a run, we’re going to be hosting the usual marathon of courses: cadet, bootcamp, combat, web 2.0. But, while the names remain, we’ve spent some time updating the material. In particular, bootcamp, combat & web 2.0 have been through the ringer. We’re hoping to get some detailed info on the updates out in the coming weeks.
I know what your cert did last summer
Most of our clients that make use of our vulnerability management service, HackRack, manage a large and usually interactive web application environment, that makes use of SSL. HackRack would then often report on findings such as weak cyphers in use (critical if the client has to adhere to PCI DSS), mismatching cert names and domain names, and then expired certs.
Now, this is easy to check and re-check when you have a couple of single hosts and openssl foo. But, a couple of hundred sites and things get interesting and time consuming.
SensePost at BlackHat USA 2010
A brief update from South Africa on some recent talks as well as the upcoming BH USA: our talk proposal has been accepted for BH USA 2010 which makes it the ninth year running that SensePost is talking in Las Vegas. One more and we qualify for free milkshakes at the Peppermill. This year we’ll be discussing caching in large scale web apps and why exposing caches to the interwebs is a Very Bad Thing. We’ll also be looking at caching services, an idea whose time should never come.
SensePost J-Baah
I’m pleased to announce the release of J-Baah – the port of CrowBar (our generic HTTP Fuzzing tool) to Java.
If you’ve used CrowBar before, using J-Baah should be a breeze. If you haven’t, it actually has a help section. :P
You can grab a copy of J-Baah from here.
ITWeb Security Summit 2010 & Afterparty
The ITWeb security summit is coming up next week from the 11th to 13th of May. This is a conference we’re quite excited about, and have been involved in for the last few years, but most recently, we’ve been able to further our involvement beyond just speaking.
For years I jealously watched as SensePost’ers would trundle all over the world shaking hands and drinking beer with the leet haxors of the world. Then a few years ago, the ITWeb Security Summit brought over Kevin Mitnick. I remember sitting in the audience awe’d not so much by what was said (sorry Kevin, I’m sure it was interesting) but at the fact a real celebrity hacker was meters from me. I still keep his lock-pick business card as a memento. Since then, the summit has gotten bigger and better. ITWeb previously brought out people like Bruce Schneier (who I think thought I was a stalker), David Litchfield, Johnny Long (he’s African now), Johny Cache, Richard Stiennon, Roberto Preatoni and Phil Zimmerman (he video conf’ed in from his hospital bed after emergency heart surgery).