Last friday Florian and me attended the 6th No-Spy Conference in Stuttgart, Germany. We gave a talk about surveillance and censorship on modern devices in North Korea and discussed various aspects with the attendees. The atmosphere was very welcoming and we had some nice discussions about various topics which allowed us to better clarify some things. The slides are available here.
Thanks to the organizers for having us!
Continue readingI’m on my way back from the
RIPE74 meeting in Budapest. It was a great event:
quite a few nice technical talks in the plenary, productive working group
meetings and some really good hallway discussions.
Big thanks to the RIPE NCC team for the smooth organization and for taking care
of us!
Here’s some stuff I found particularly interesting:
These were my own contributions:
Continue reading Continue readingGood Afternoon,
It is a pleasant surprise for many (us included) that Microsoft implemented support for the RDNSS (RFC 8106) option in Router Advertisements beginning with the Windows 10 Creators Update. Interestingly, I wasn’t able to find any official documents from Microsoft stating this. As we are involved in a lot of IPv6 related projects for our customers, the lack of RDNSS support for Windows and DHCPv6 for Android is a major pain point when implementing IPv6 in mixed client segments, as you need to implement both mechanisms to ensure that all clients do get the relevant network parameters. I won’t beat on the dead horse, but Microsoft’s decision is a huge step in the right direction and one can hope that one day Google finds a “compelling use case” to implement at least stateless DHCPv6 for Android.
Continue reading Continue readingTroopers ’17 – the 10th edition – madness is over and hopefully all of you are well rested and recovered after this special week. Of course the rest of the world did not stand still and thus Google lifted the curtains on a new public portal collecting and promoting the Open Source Software projects developed by employees of Google: opensource.google.com. There are a lot of interesting projects that might incubate new interesting developments. And even security oriented tools and projects (51 at the time of writing to be precise) are publically available [1].
Continue reading Continue readingIn the recent post on the IPv6 properties of the latest MS Windows versions I announced another one providing details on the RFC 6980 related testing I had performed. So here we go.
When doing IPv6 security testing there’s mainly four toolkits which can be used:
Each of them has specific strenghts & limits, which will not be discussed here. For the testing I performed I chose Chiron as it has the most powerful options when it comes to IPv6 extension headers and fragmentation.
Continue reading Continue readingExactly one week ago I noticed an “urgent” tweet from Tavis Ormandy to get in
contact with the Cloudflare team.
Normally when a tweet like this appears from Tavis, something is horribly
broken. Well, today we know the background of this tweet as the
bug tracker
issue went public and it exposed quite a bug from Cloudflare.
While there is some background story how Tavis found the bug, because he wasn´t actively looking into the Cloudflare infrastructure and it was rather discovered by accident when odd data appeared in his fuzzing corpus. When he looked closely he found data that was not in any mean related to the expected data from various websites.
Continue reading Continue readingIP Multimedia Subsystem (IMS) offers many multimedia services to any IP-based access network, such as LTE or DSL. In addition to VoLTE, IMS adds service provider flexibility, better QoS and charging control to the 4th generation of mobile networks. IMS exchanges SIP messages with its users or other IMS and usually these communications are secured by TLS or IPSec. But if an attacker manages to break the confidentiality and the integrity with IMS, he would find it vulnerable to several attacks.
Continue reading Continue readingWe just published my Whitepaper about First Steps, Preparation Plans, and Process Models for Incident Handling, that I wrote to pass the time between Christmas and New Year. The whitepaper sums up information that I consider to be useful to prepare for IT security incidents as a conclusion from the incidents in which we supported over the past year.
Have you for example thought about classes of incidents that are most likely to affect you and formulated Incident Handling Preparation Plans for those incidents?
Continue reading Continue readingNiklaus, Manuel and me had a great time speaking about one of the latest Tablet PCs from DPRK at 33C3 this year. Our work on RedStar OS from last year revealed a nasty watermarking mechanism that can be used to track the origin and distribution path of media files in North Korea. We have seen some interesting dead code in some of RedStar’s binaries that indicated a more sophisticated mechanism to control the distribution of media files. We got hands on a Tablet PC called “Ul-lim” that implemented this advanced control mechanism.
Continue reading Continue readingRecently we posted first part of our Bluetooth research diary. Today, we want to continue on that topic and tell you about Bluetooth proxying and packet replay with a new tool.
This time we had a new gadget to play with: our colleague Florian Grunow shared
with us a curious IoT device – Bluetooth socks… real socks that you control with
an app to heat your feet. The future is here… 😉
