this post was submitted on 31 Jan 2024
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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).
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You still need some privileged process to exploit. Glibc code doesn't get any higher privileges than the rest of the process. From kernel's point of view, it's just a part of the program like any other code.
So if triggering the bug in your own process was enough for privilege escalation, it would also be a critical security vulnerability in the kernel - it can't allow you to execute a magic sequence of instructions in your process and become a root, that completely destroys any semblance of process / user isolation.