Insinuator.net – Page 25 – Bold Statements

May 19, 2017 by Jacky Hammer

Looking back on RIPE 74

From May 8th to 12th I was able to attend the 74th RIPE meeting in Budapest, Hungary. Being rather new to the networking community, I enjoyed learning a lot of different things, not only from the various interesting talks but also from inspiring conversations with a variety of people from all areas during the beautiful social events.

As it was the first RIPE meeting for me, I was very thankful for the “Newcomer’s Introduction” on Monday morning, containing a RIPE and RIPE NCC 101. It was quite helpful to get into the mindset and understand the structure of the meeting, like the division into different working groups based on the participants’ interests. After familiarizing myself with the concept, I chose to attend several sessions on Address Policy, IPv6, Routing, Open Source, and DNS working groups besides the general plenary sessions. I’ll be reviewing those sessions here. Continue reading “Looking back on RIPE 74”

Misc

May 12, 2017 by Enno Rey

RIPE74 / Why IPv6 Security Is So Hard

I’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!

Continue reading “RIPE74 / Why IPv6 Security Is So Hard”

Breaking

May 10, 2017 by Timo Schmid

Git Shell Bypass By Abusing Less (CVE-2017-8386)

The git-shell is a restricted shell maintained by the git developers and is meant to be used as the upstream peer in a git remote session over a ssh tunnel. The basic idea behind this shell is to restrict the allowed commands in a ssh session to the ones required by git which are as follows:

git-receive-pack
- Receives repository updates from the client.
git-upload-pack
- Pushes repository updates to the client.
git-upload-archive
- Pushes a repository archive to the client.

Besides those built-in commands, an administrator can also provide it’s own commands via shell scripts or other executable files. As those are typically completely custom, this post will concentrate on the built-in ones.

Note: This has nothing to do with the also recently fixed vulnerabilities in gitlab [1] [2].

Continue reading “Git Shell Bypass By Abusing Less (CVE-2017-8386)”

Misc

May 8, 2017 by Christopher Werny

One Step Closer – RDNSS (RFC 8106) Support in Windows 10 Creators Update

Good 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 “One Step Closer – RDNSS (RFC 8106) Support in Windows 10 Creators Update”

Breaking

April 13, 2017 by Omar Eissa

Autonomic Network Part 3: Vulnerabilities

This is the 3rd post in the series of Autonomic Network (AN), it will dedicated for discussing the vulnerabilities. I recommend reading the first 2 parts (part one, part two) to be familiar with the technology and how the proprietary protocol is constructed.

Initially we will discuss 2 of the reported CVEs, but later there is more CVEs to come 😉

Continue reading “Autonomic Network Part 3: Vulnerabilities”

Misc

April 3, 2017 by Christoph Klaaßen

(Mostly) New, Interesting, and Security-focused Open Source Projects

Troopers ’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 Continue reading “(Mostly) New, Interesting, and Security-focused Open Source Projects”

Events

April 1, 2017 by Enno Rey

Some Quick Tips for Submitting a Talk to Black Hat or TROOPERS

Given the CfP for Black Hat US in Vegas ends in a few days – and as apparently some people have already started to think about their TR18 submissions – I’ll quickly provide some loose recommendations on how to write a submission here. There’s quite some reasonable advice out there already (the BH CfP site lists this and this which you should both read as well) but some of you might find it useful to get (yet) another perspective. Continue reading “Some Quick Tips for Submitting a Talk to Black Hat or TROOPERS”

Breaking

March 20, 2017 by Stefan Kiese

This is Why Your Wireless Mouse Should Have a Tail and Your Presenter is a Fail

Puh…it’s been a long time since my last post, huh?
However, let’s get straight back to topic. Today, I want to issue a warning, especially in face of upcoming Troopers 2017 (less than two days to go, wooo! 10th anniversary!): be careful when using wireless equipment (presenters, mouses, keyboards,…), especially during Troopers, but also in daily use. Continue reading “This is Why Your Wireless Mouse Should Have a Tail and Your Presenter is a Fail”

Breaking

March 20, 2017 by Omar Eissa

Autonomic Networking – Part 2: Analysis

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”

Breaking

March 19, 2017 by Omar Eissa

Autonomic Networking – Part 1: Overview

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”