A vulnerability in the Linux sudo command has been discovered that could allow unprivileged users to execute commands as root. Thankfully, this vulnerability only works in non-standard configurations and most Linux servers are unaffected.
Before we get to the vulnerability it is important to have some background information on how the sudo command works and how it can be configured.
When executing commands on a Linux operating system, unprivileged users can use the sudo (super user do) command to execute commands as root as long as they have been given permission or know the root user's password.
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