This is the second part in the Autonomic Network series. We have introduced previously in our first part the Autonomic Network (AN), took a look about the needed configuration to run it on Cisco gear and what is the expected communication flow. In this post, we will dive deeper to have a closer look on the packets and how they are composed. Continue reading “Autonomic Networking – Part 2: Analysis”Continue reading
This is a 3-part series which introduces and analyzes Cisco’s implementation for Autonomic Network. In the 1st part, the technology is introduced and we have an overview about communication flow. In the 2nd part, Cisco’s proprietary protocol is reverse engineered 😉 then finally in the 3rd part, multiple vulnerabilities will be disclosed for the first time. If you’re aware of the technology, you can skip directly to part 2 where the action begins! Continue reading “Autonomic Networking – Part 1: Overview”Continue reading
At CSA, I was talking about hypervisors, breakouts and an overview of security measures to protect the host. (Slides)
This ranged from the basic features some hypervisors provide out of the box to advanced features like SELinux, device domain models and XSM-FLASK. Continue reading “CSA Summit CEE and BSides Ljubljana 2017”
Last year I encountered a slight variation of an internal port scan vulnerability for the CrystalReports component of SAP Business Objects. The original vulnerability was presented and disclosed by rapid7 in the talk “Hacking SAP Business Objects”. The corresponding slides can be found here. Continue reading “Information About SAP Security Note 2336795”Continue reading
When doing IPv6 security testing there’s mainly four toolkits which can be used: Continue reading “Testing RFC 6980 Implementations with Chiron”Continue reading
Last week we gave a talk at the very first 31c0n in Auckland, New Zealand. The talk focused mainly on the methodology that we use to assess security products.
More specifically, this methodology consists of 7 steps Continue reading “31c0n 2017 in Auckland, New Zealand”Continue reading
The event of the events is getting closer and again, we are very optimistic to have a lot of awesome trainings, talks, evening events, and discussions. But we again will also have some “features” and gimmicks for those of you who would like to play with new, old, or just interesting technologies. As you might remember, since some years one of these features is and again will be our own GSM Network. As we are improving our setup from year to year, this time we’d like to give you the chance to actively participate with ideas and your own services. Continue reading “Troopers17 GSM Network – How about your own SMPP Service?”Continue reading
I’m a big fan of Chris Gates’ publications on DevOops and From Low to Pwned. The content reflects a lot of issues that we also experience in many assessments in general and assessments in agile environments in particular. In addition, we were supporting several projects recently that were organized in an agile way. In this post, I want to summarize some thoughts on how security work can/should be integrated into agile projects. Continue reading “Agile Development & Security”Continue reading
Exactly 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. Continue reading “Cloudflare Incident #Cloudbleed”
IP 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 “Exploitation of IMS in absence of confidentiality and integrity protection”Continue reading