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README.md

(360) 0x03. Python - /proc filesystem

Specializations > System programming & Algorithm > Linux Programming

Project author

Alexandre Gautier

Assignment dates

01-12-2021 to 01-22-2021

Description

Introduction to using the /proc filesystem to explore the memory footprint of a running process.

Requirements

  • All your modules should have documentation (python3 -c 'print(__import__("my_module").__doc__)')
  • All your classes should have documentation (python3 -c 'print(__import__("my_module").MyClass.__doc__)')
  • All your functions (inside and outside a class) should have documentation (python3 -c 'print(__import__("my_module").my_function.__doc__)' and python3 -c 'print(__import__("my_module").MyClass.my_function.__doc__)')

Provided file(s)

Mandatory Tasks

✅ 0. Hack the VM

Write a script that finds a string in the heap of a running process, and replaces it.

  • Usage: read_write_heap.py pid search_string replace_string
    • where pid is the pid of the running process
    • and strings are ASCII
  • The script should look only in the heap of the process
  • Output: you can print whatever you think is interesting
  • On usage error, print an error message on stdout and exit with status code 1

File(s): read_write_heap.py

⬜ 1. Blog post #1

Write a blog post about the /proc filesystem and the /proc/maps and /proc/mem files.

Try to explain how to parse the /proc/maps file in order to read the virtual memory.

Your posts should have examples and at least one picture, at the top. Publish your blog post on Medium or LinkedIn, and share it at least on Twitter and LinkedIn.

Advanced Tasks

⬜ 2. Blog post #2

Write a blog post about the virtual memory.

How does the virtual memory map into the RAM?

Try to go as deep as possible in your explanation, and try to explain how the Kernel handles it.

Your posts should have examples and at least one picture, at the top. Publish your blog post on Medium or LinkedIn, and share it at least on Twitter and LinkedIn.

Student