Events
by Stefan Kiese

BSides LV 2016: Recap

Hey everyone,

Just a short recap from my side regarding this year’s BSide in Las Vegas, NV. It was my first time there and I pretty much enjoyed it. After entering the venue on the first con day (Tuesday) I was a little bit shocked, as the staff sent me to the “end of the line just around the corner” – the end being many corners and many floors away 😉 Speaking to some guys while standing in line, time quickly passed by and before finally hitting the registration desk, there were already some people from the staff giving away the conference badges to the waiting folks. The waiting time was no comparison to last year’s DEF CON, where I (and obviously all the other “humans”, how attendees at DEF CON are called) had to wait nearly _four_ hours to get a badge to enter the con. DEF CON staff already calls this the annual “Line Con”. Enough bashing, back to topic 😉

The opening keynote was held by Lorrie Cranor, who spoke first and Michael Kaiser, who did the second part. I enjoyed Lorrie’s part which was about frequent password changes in environments like companies or universities. She talked about studies that revealed, many people who have to change passwords frequently use patterns by changing their passwords, like shifting letters or iterating numbers. This behavior mostly provides only a little security benefit or could otherwise also decrease security, she said.

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Events
by Matthias Luft

SIGS DC Day

Today I had to give the pleasure to give a keynote at the SIGS DC Day on the need to evaluate Cloud Service Providers in a way that looks behind (or at least tries to) security whitepapers and certification reports. The slides can be found here.

I also particularly enjoyed the following two talks:

Sean O’Tool from Swisscom AG covered challenges of an infrastructure to cloud migration. Even though he only briefly touched the topic, I enjoyed his description of their firewalling model: Seeing that centralized firewall operation (or more precisely, rule design and approval) is limited/challenged by the understanding of the application, they transferred control over firewall rule sets (beyond a basic set of infrastructure/ground rules) to the application teams (using of features like OpenStack’s security groups, where he also talked about limitations of those). They compensated the loss of “centralized enforcement by a security group” with rule reviews — an approach that will become way more relevant (and necessary) in the future.

Marc Holitscher from Microsoft covered their “second line of defense”, which is a strong audit framework for controls they implement for their Azure/Office cloud environment. The relevant information (which was new for me too) was that they published a lot of audit information just recently. Details are described here.

Cheers,
Matthias

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Events
by Oliver Matula

25th USENIX Security Symposium & WOOT Workshop

Last month the annual USENIX Security Symposium with its co-located workshops (WOOT, CSET, FOCI, ASE, and HotSec) was held in Austin, Texas. The program of the conference together with the published papers can be found here and information on the workshops can be found here.

The research topics were quite diverse and included subjects such as low-level attacks, cryptographic attacks, and vehicle attacks. To give you an impression on the research that has been presented at the conference, let us discuss some of the talks in the following:

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Misc
by Enno Rey

To Control Something

Some years ago I discussed the meaning of the term “control” in this post, but at the time I was mainly referring to the noun “control”. Given I’ll extensively use the term “control” as a verb in the next parts of “the DMZ series” and some upcoming talks I reflected a bit on its meaning (as a verb). In the following I’ll lay out the definition/understanding to be employed at those occasions.

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Breaking
by Kevin Schaller

Hardware Hacking Week @ ERNW

Internal workshops are one of the reoccurring events at ERNW, that help us to gain knowledge in areas outside our usual expertise. One of the recent workshops which happened during the week from August 22nd-25th was Hardware Hacking. Held by Brian Butterly (@BadgeWizard) and Dominic Spill (@dominicgs), this workshop took place in two parts. Brian kickstarted the introductory session by guiding us through the fundamental steps of Hardware Hacking. Brian did an excellent job of making things simpler by giving a detailed explanation on the basic concepts. For a beginner in hardware hacking, the topic could be rather intimidating if not handled properly.

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Building
by Enno Rey

Considerations on DMZ Design in 2016, Part 2: A Quick Digression on Reverse Proxies

This is the second part of a series with considerations on DMZ networks in 2016 (part 1 can be found here). Beforehand I had planned to cover classification & segmentation approaches in this one, but after my little rant on how “the business” might approach & think about reverse proxies in the first part, I felt tempted to elaborate a bit further on this particular topic. I kindly ask for your patience 😉 and will digress a bit for the moment.

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Breaking
by Niklaus Schiess

KNXmap: A KNXnet/IP Scanning and Auditing Tool

Users of the KNX, a standard for home automation bus systems, may already have come across KNXnet/IP (also known as EIBnet/IP): It is an extension for KNX that defines Ethernet as a communication medium for KNX which allows communication with KNX buses over IP driven networks. Additionally, it enables one to couple multiple bus installations over IP gateways, or so called KNXnet/IP gateways.

In the course of some KNX related research we’ve had access to various KNXnet/IP gateways from different vendors, most of them coupled in a lab setup for testing purposes. The typical tools used for such tasks are ETS, the professional software developed by the creators of KNX (proprietary, test licenses available) and eibd, an open source implementation of the KNX standard developed by the TU Vienna.

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Events
by Florian Grunow

MRMCD16 – diagnosis:critical

This year’s MRMCD16 had a topic that immediately let me submit a talk about medical device security: “diagnosis:critical”. Or to quote the official website:

Security issues in soft- and hardware have a low chance of healing, especially in medical IT.

Despite years of therapy using code reviews and programming guidelines, we still face huge amounts of vulnerable software that probably is in need of palliative treatment.

Security vulnerabilities caused by the invasion of IT in the medical sector are becoming real threats. From insulin pumps over analgesic pumps through to pace makers, more and more medical devices have been hacked already. This year's motto "mrmcd2016 - diagnosis:critical" stands summarizing for the current state of the whole IT sector.


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Breaking
by Timo Schmid

Reverse Engineering With Radare2 – Part 2

Welcome back to the radare2 reversing tutorials. If you’ve missed the previous parts, you can find them here and here.

Last time we’ve used the rabin2 application to view the  strings found inside the challenge01 binary to find password candidates. Based on the results we looked into the assembly to find the correct password. In this post, we’ll go through the next challenge and try out some of the features provided by radare2.

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