Crossover Episode: The Real-Life Story of the First Mainframe Container Breakout

Presented at DEF CON 29 (2021), Aug. 7, 2021, 10 a.m. (45 minutes)

You've seen talks about container hacking. You've seen talks about mainframe hacking. But how often do you see them together? IBM decided to put containers on a mainframe, so a container hacker and a mainframe hacker decided to join forces and hack it. We became the first people on the planet to escape a container on a mainframe, and we're going to show you how. Containers on a mainframe? For real. IBM zCX is a Docker environment running on a custom Linux hypervisor built atop z/OS - IBM's mainframe operating system. Building this platform introduces mainframe environments to a new generation of cloud-native developers-and introduces new attack surfaces that weren't there before. In this crossover episode, we're going to talk about how two people with two very particular sets of skills went about breaking zCX in both directions, escaping containers into the mainframe host and spilling the secrets of the container implementation from the mainframe side. When two very different technologies get combined for the first time, the result is new shells nobody's ever popped before. REFERENCES: Getting started with z/OS Container Extensions and Docker: https://www.redbooks.ibm.com/abstracts/sg248457.html The Path Less Traveled: Abusing Kubernetes Defaults: https://www.youtube.com/watch?v=HmoVSmTIOxM Attacking and Defending Kubernetes Clusters: A Guided Tour: https://securekubernetes.com Evil Mainframe penetration testing course :https://www.evilmainframe.com/ z/OS Unix System Services (USS): https://www.ibm.com/docs/en/zos/2.1.0?topic=system-basics-zos-unix-file z/OS Concepts: https://www.ibm.com/docs/en/zos-basic-skills?topic=zc-zos-operating-system-providing-virtual-environments-since-1960s Docker overview: https://docs.docker.com/get-started/overview/

Presenters:

• Chad Rikansrud / Bigendian Smalls - Hacker   as Chad Rikansrud (Bigendian Smalls)
  Chad is the same, but for mainframes and mainframe security. @bigendiansmalls
• Ian Coldwater - Hacker
  Ian is a leading expert on containers and container security. @IanColdwater

Links:

• https://defcon.org/html/defcon-29/dc-29-speakers.html#coldwater
• https://infocon.org/cons/DEF CON/DEF CON 29/DEF CON 29 video and slides/DEF CON 29 - Ian Coldwater Chad Rikansrud (Bigendian Smalls) - The Real-Life Story of the First Mainframe Container Breakout-Demo1-WhatIsAContainer.mp4
• https://infocon.org/cons/DEF CON/DEF CON 29/DEF CON 29 video and slides/DEF CON 29 - Ian Coldwater Chad Rikansrud (Bigendian Smalls) - The Real-Life Story of the First Mainframe Container Breakout-Demo2-Breakout.mp4
• https://infocon.org/cons/DEF CON/DEF CON 29/DEF CON 29 video and slides/DEF CON 29 - Ian Coldwater Chad Rikansrud (Bigendian Smalls) - The Real-Life Story of the First Mainframe Container Breakout-Demo3-Mainframe.mp4
• https://infocon.org/cons/DEF CON/DEF CON 29/DEF CON 29 video and slides/DEF CON 29 - Ian Coldwater Chad Rikansrud (Bigendian Smalls) - The Real-Life Story of the First Mainframe Container Breakout.mp4
• https://infocon.org/cons/DEF CON/DEF CON 29/DEF CON 29 presentations/Ian Coldwater Chad Rikansrud (Bigendian Smalls) - The Real-Life Story of the First Mainframe Container Breakout.pdf (slides)
• https://infocon.org/cons/DEF CON/DEF CON 29/DEF CON 29 video and slides/DEF CON 29 - Ian Coldwater Chad Rikansrud (Bigendian Smalls) - The Real-Life Story of the First Mainframe Container Breakout-Demo1-WhatIsAContainer.srt (subtitles)
• https://infocon.org/cons/DEF CON/DEF CON 29/DEF CON 29 video and slides/DEF CON 29 - Ian Coldwater Chad Rikansrud (Bigendian Smalls) - The Real-Life Story of the First Mainframe Container Breakout-Demo2-Breakout.srt (subtitles)
• https://infocon.org/cons/DEF CON/DEF CON 29/DEF CON 29 video and slides/DEF CON 29 - Ian Coldwater Chad Rikansrud (Bigendian Smalls) - The Real-Life Story of the First Mainframe Container Breakout-Demo3-Mainframe.srt (subtitles)
• https://infocon.org/cons/DEF CON/DEF CON 29/DEF CON 29 video and slides/DEF CON 29 - Ian Coldwater Chad Rikansrud (Bigendian Smalls) - The Real-Life Story of the First Mainframe Container Breakout.srt (subtitles)
• https://www.youtube.com/watch?v=7DXF7YDBf-g

Similar Presentations:

• CackalackyCon 2 (2023) / Buffer Overflows? In my Mainframe?
• DEF CON 30 (2022) / Doing the Impossible: How I Found Mainframe Buffer Overflows
• DEF CON 22 (2014) / From root to SPECIAL: Pwning IBM Mainframes