Lesson plan

Zeroshell

Zeroshell is a small open-source Linux distribution for servers and embedded systems which aims to provide network services. Its administration relies on a web-based graphical interface; no shell is needed to administer and configure it. Zeroshell is available as Live CD and CompactFlash images, and VMware virtual machines. Zeroshell can be installed on any IA-32 computer with almost any Ethernet interface. It can also be installed on most embedded devices and single-board computers such as Raspberry Pi and Orange Pi. And it can be installed on VirtualBox. The project reached EOL in April 2021 with version 3.9.5. There are several known vulnerabilities for various versions of this software: V2, V3.6x up to V3.7, V3.9.0, V3.9.3 and last V3.9.5 for example, allowing an attacker to e.g. gain root access to the device easily. The main attack vector is the cgi script in use, 'kerbynet'.

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Article summary

Zeroshell is a small open-source Linux distribution for servers and embedded systems which aims to provide network services. Its administration relies on a web-based graphical interface; no shell is needed to administer and configure it. Zeroshell is available as Live CD and CompactFlash images, and VMware virtual machines. Zeroshell can be installed on any IA-32 computer with almost any Ethernet interface. It can also be installed on most embedded devices and single-board computers such as Raspberry Pi and Orange Pi. And it can be installed on VirtualBox. The project reached EOL in April 2021 with version 3.9.5. There are several known vulnerabilities for various versions of this software: V2, V3.6x up to V3.7, V3.9.0, V3.9.3 and last V3.9.5 for example, allowing an attacker to e.g. gain root access to the device easily. The main attack vector is the cgi script in use, 'kerbynet'.

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Discussion questions

  1. Summarise the article in your own words. Which single claim would you verify first, and why?
  2. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
  3. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

Bibliography

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Key claims and bibliography are generated from the same tracked claims and sources as the article page.