linux_kernel.md

Linux Kernel

Content

• Blogs and Awesomes
• Exploitation
• Fuzzing
• Misc
• Toolchains and Cross-compilation
• Repositories
• Resources
• Rootkits
• Rust

Blogs, Awesomes and learning

• build linux: short tutorial about building Linux based operating systems.
• How did I approach making linux LKM rootkit, “reveng_rtkit” ?
• Linux kernel programming: code repository for Linux Kernel Programming, published by Packt.
• man pages: manual pages for GNU/Linux
• Linux rootkit series by Xcellerator
  • Introduction and Workflow
  • Ftrace and Function Hooking
  • A Backdoor to Root
  • Backdooring PRNGs by Interfering with Char Devices
  • Hiding Kernel Modules from Userspace
  • Hiding Directories
  • Hiding Processes
  • Hiding Open Ports
  • Hiding Logged In Users (Modifying File Contents Without Touching Disk)
  • A Dive into the Kernel Component of Drovorub
  • New Methods for Kernel 5.7+
• Writing a simple rootkit for linux

Exploitation

• kasld: collection of various techniques to infer the Linux kernel base virtual address as an unprivileged local user.
• kernel-exploit-factory: Linux kernel CVE exploit analysis report and relative debug environment.
• Linux Exploit Suggester: Linux privilege escalation auditing tool
• Linux Kernel Exploit: links related to Linux kernel exploitation.
• Linux Kernel Exploitation: collection of links related to Linux kernel security and exploitation.

Fuzzing

• difuze: fuzzer for Linux Kernel Drivers.
• healer: Kernel fuzzer inspired by Syzkaller.
• Syzkaller: unsupervised coverage-guided kernel fuzzer.
  • Syzbot: continuously fuzzes main Linux kernel branches and automatically reports found bugs
  • SyzScope: automatically uncover high-risk impacts given a bug with only low-risk impacts.

Misc

• Clang Built Linux: building the Linux kernel with Clang.
• crash: Linux kernel crash utility
• lowlevelprogramming-university: How to be low-level programmer
• lunatik: framework for scripting the Linux kernel with Lua
• TuxSuite: on-demand APIs and tools for building Linux Kernels.
• vmlinux-to-elf: tool to recover a fully analyzable .ELF from a raw kernel.

Toolchains and Cross-compilation

• Buildroot: simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation.
• clang: C language family frontend for LLVM.
• Cross-compilation toolchains (Bootlin): large number of ready-to-use cross-compilation toolchains, targetting the Linux operating system on a large number of architectures.
• Dockcross: cross compiling toolchains in Docker images.
• gcc: GNU Compiler Collection.

Repositories

• Next: next tree
• Rust: rust tree
  • RFL-patch-registry: aggregate Rust abstractions for Linux that have not yet been upstreamed.
• Stable: Stable tree
• Torvalds: Linus Torvald tree

Resources

• Bootlin courses: Linux related courses from bootlin
  • Training material: embedded Linux and kernel training materials.
• Defence Map: relationships between vulnerability classes, exploitation techniques, bug detection mechanisms, and defence technologies.
• Elixir: Linux kernel source code cross reference.
• kconfig-hardened-check: tool for checking the security hardening options of the Linux kernel.
• kernel-security-learning: Anything about kernel security.
• Kernel documentation: official linux kernel documentation.
• Kernel map: interactive map of Linux kernel sources.
• kernel.org: linux kernel archives.
• kernelci.org: test system focused on the upstream Linux kernel.
• kernelconfig: Linux kernel configuration entries.
• like-gdb: fully dockerized Linux kernel debugging environment.
• Linux lab: create a Docker and QEMU based Linux development Lab to easier the learning.
• linux-insides: a book about linux kernel and its insides.
• Linux kernel CVEs: Tracking CVEs for the linux Kernel
• Linux Kernel Labs: lectures and labs on Linux Kernel.
• Linux Kernel Module Cheat: emulation setup to study and develop the Linux kernel.
• Linux Kernel Wiki: linux kernel wiki (in chinese)
• Linux Kernel Workshop: learn linux kernel programming.
• Linux Weekly News: site dedicated to producing the best coverage from within the Linux and free software development communities.
• LKFT: Linux Kernel Functional Testing.
• lkmpg: The Linux Kernel Module Programming Guide.
• ltp: Linux Test Project.
• [Mailing Lists]:
  • Lore kernel: Linux kernel mailing lists.
    • Linux hardening: Linux hardening.
    • Kernel Hardening: kernel hardening.
• mebeim: Linux kernel syscall tables.
• syscall.sh: Alternative Linux kernel syscall tables

Rootkits

• 1337kit: 64-bit LKM Rootkit builder based on yaml prescription.
• Awesome Linux Rootkits.
• ebpfkit: ebpfkit is a rootkit powered by eBPF
• brokepkg: LKM rootkit working in Linux Kernels 2.6.x/3.x/4.x/5.x
• Brootus: educational Linux Kernel Rootkit.
• Diamorphine: LKM rootkit for Linux Kernels 2.6.x/3.x/4.x/5.x and ARM64.
• Drovorub: Analysis of Drovorub
• enyelkm: LKM rootkit for Linux x86 with the 2.6 kerne
• KoviD: Kernel rk
• linux-rootkit: Remote Linux Loadable Kernel Module (LKM) rootkit (For Linux Kernels 5.x).
• linux-rootkits: collection of Linux kernel rootkits found across the internet taken and put together.
• Pinkit: LKM rootkit that executes a reverse TCP netcat shell with root privileges.
• Red Blue Teams: Linux Rootkits (4.x Kernel)
• Reptile: LKM Linux rootkit.
• Research rootkit: LibZeroEvil & the Research Rootkit project.
• Reveng_rtkit: Linux Loadable Kernel Module (LKM) based rootkit (ring-0).
• rkduck: Linux v4.x.x Rootkit
• Rootkit: rootkit for Ubuntu 16.04 and 10.04 (Linux Kernels 4.4.0 and 2.6.32), both i386 and amd64.
• Rootkit list download: list of rootkits (includes also userspace rootkits).
• rootkitkev: Rootkit Development tutorial series.
• Satan: x86 Linux Kernel rootkit for Debian 9
• spy: Linux kernel mode debugfs keylogger.
• Sutekh: rootkit that gives a userland process root permissions.
• TripleCross: Linux eBPF rootkit.

Rust

• Getting started: official documentation for getting started with Rust and Linux kernel.
• knock-out: example of a kernel module in Rust.
• out-of-tree: basic template for an out-of-tree Linux kernel module written in Rust.
• Rust for Linux: organization for adding support for the Rust language to the Linux kernel.
• Rust for Linux mailing list: rust for Linux mailing list
• Rust Kernel Programming (blog)