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RE: LeoThread 2024-11-17 10:12

in LeoFinance11 months ago

Part 2/5:

Kernel exploits are particularly interesting because they target vulnerabilities within the kernel itself - the core of the operating system that runs at a higher privilege level. When a user-mode program needs to perform a privileged task, such as opening a file or creating a socket, it must make a system call to the kernel. If the kernel doesn't properly sanitize these input parameters, it can lead to vulnerabilities that a user-mode program can exploit to take advantage of the kernel's code.

The Double-Free Vulnerability

This latest Linux privilege escalation exploit takes advantage of a double-free vulnerability in the netfilter subsystem within the socket API of the Linux kernel. A double-free occurs when the same memory object is freed twice, which can lead to a use-after-free condition where the user can still access the freed data.

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