Building

IPv6 in RFIs/Tendering Processes

In one of our customer environments each vendor offering an IT product/solution is asked to fill out a questionnaire collecting information on a number of technical parameters with regard to their product[s]. We were recently asked to come up with a proposal of 8 to 10 IPv6-related questions to be added to the questionnaire/process. Here’s what we suggested:

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Building

MLD Considered Harmful?

This is a guest post from Antonios Atlasis.

On Thursday the 20th Enno, Jayson and I had the pleasure to present our latest research results  regarding MLD at Deepsec 2014, both from vendors’ implementation perspective as well as regarding protocol design flaws (some preliminary results as well as our testing methodology were discussed here and here).

For refreshing out memory, in a nutshell, the purpose of MLD, a subprotocol of IPv6, is to inform routers about the presence of nodes which are interested in receiving specific multicast traffic (RFC 2710). The newer version of MLD, MLDv2 adds the ability for source address selection (RFC 3810).

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Breaking

Scal(e)ing down Privacy

As you might know we are continuously doing research on medical devices. I presented some of the new results at Power of Community 2014 last week and we thought we would share some of the details with you here. The focus of the previous work was testing medical devices that are used in hospitals like patient monitors, syringe pumps or even MRIs. This time we looked at a device that every user can use at home and which is available to anyone on the market: A smart scale.

The scale implements some basic features as you might have guessed, that is measuring your weight. In this case there are a lot more additional features that you can use, e.g. measuring the air quality, the room temperature, your heart rate and your fat mass. The latter makes testing this device quite hard, because somebody has to step on it and the results were not funny at all and will be kept secret! 😉

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Breaking

GitHub Enterprise 2.0.0 Fixes Multiple Vulnerabilities

Recently we had the pleasure to take a look at GitHub’s Enterprise appliance. The appliance allows one to deploy the excellent GitHub web interface locally to host code on-site. Besides the well known interface, which is similar to the one hosted at github.com, the appliance ships with a separate interface called the management console, which is used for administrative tasks like the configuration of the appliance itself. This management interface is completely decoupled from the user interface.

During our assessment we focused on the management console where we found several vulnerabilities (others may have found them, too). On November 11, 2014 GitHub released a security advisory which included the most critical findings that have been fixed in GitHub Enterprise 2.0.0. Because the advisory doesn’t include any detailed information, we will discuss some of those vulnerabilities in detail.

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Building

MLD to Be Reconsidered?

This is guest post from Antonios Atlasis.

Following my September post about the connection between MLD and Neighbor Discovery, as well as Enno’s introduction about our upcoming talk at DeepSec, I would like to try to enlighten you about this with some technical details. First, we have some facts:

  1. MLD is pre-enabled in most modern Operating Systems.
  2. MLD traffic is sent out-of the-box during the stack initialization, as well as periodically.
  3. They also interact with/respond to MLD Queries without any further configuration.

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Building

Protocol Properties & Attack Vectors

Next week, at DeepSec, we’re going to give a talk about Multicast Listener Discovery (MLD), a component of IPv6 which is realized by means of ICMPv6 messages. There are two versions of MLD (mainly specified in RFC 2710 and RFC 3810 respectively) and while MLD is technically implemented by ICMPv6 exchanges, these specifications describe a whole set of rules and communication formats, hence we can safely talk about “the MLD protocol”.

Now, you might ask: how does one tackle the task of examining the security “of a protocol”?

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Events

Power of Community 2014

I had the pleasure to participate in this year’s Power of Community and was invited to talk about the insecurity of medical devices. The conference is based in Seoul, Korea and started in 2006. It has a strong technical focus and it is a community driven event. For me it was great to participate as mostly hackers from Asia were there and I got the chance to talk to a lot of nice folks that I wouldn’t be able to meet otherwise. This is especially true for the host, vangelis.

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Building

Dynamics of IPv6 Prefixes within the LIR Scope in the RIPE NCC Region

To contribute to the current debate on IPv6 route deaggregation & “strict-filtering” performed by certain ISPs we just released a white paper on “Dynamics of IPv6 Prefixes within the LIR Scope in the RIPE NCC Region“. I will give a talk on the overall topic later today at the Routing Working Group. We sincerely hope that the IPv6 community becomes aware of the inherent issues, and that practical solutions can be found which consider & meet the needs of the different parties involved.

Best

Enno

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