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7 Ways to Tweak Sudo Command in Linux
(itsfoss.com)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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In other words: a compromised system at the User level can easily compromised at the admin level if there are no additional checks/measures in place. Same for Windows. Just change the link to a Programm you commonly need the press OK to to you maleware. Profit.
The proper way to handle issues like these is process level permissions (i.e. capability systems), instead of user level. Linux CGroups, namespaces, etc. are already moving that way, and in effect that's the way windows is trying to head too. (Windows has its own form of containerization called AppContainers, which UWP apps use. Windows also has its own capability system).