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Redis Sandbox Escape (CVE-2022-0543)

cve-2022 | Level: Easy  | Total Lab Runs: 0 | Premium Lab

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In February 2022, a critical vulnerability in a popular persistent key-value store, Redis, was reported. It was discovered that Redis is prone to a (Debian-specific) Lua sandbox escape due to a packaging issue, which could result in remote code execution.

An important point to note is that this issue only applies to Debian and Debian-derived Linux distributions. Upstream Redis is not affected. That makes it a Debian vulnerability, not a Redis one. The root cause of the issue is dynamic linking, detailed in a post written by the researcher who discovered this vulnerability.

This vulnerability received the CVE id of CVE-2022-0543. Debian also released the DSA-5081 security advisory on 18 February 2022, and Ubuntu released USN-5316-1 on 7 March 2022.

In this lab environment, the user will get access to an Ubuntu CLI instance. The provided Ubuntu instance has a vulnerable version of Redis.

Objective: Exploit the local Lua sandbox escape vulnerability in the Redis server to gain root access and retrieve the flag!

The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:

  • Using automated scanners
  • Using brute force attacks
  • Denial of Service attacks
  • Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
  • Attacking the lab infrastructure

Users violating the above will be either temporarily or permanently banned from the website. 

If you are unsure about an activity, then please contact support to confirm that it is allowed on our website.

Technical Support for this Lab:

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