Kernel Root Exploit via a ptrace() and execve() Race Condition
6,243Let's have a look at a recent kernel local privilege escalation exploit!
Exploit Source: https://hxp.io/blog/79/hxp-CTF-2020-wisdom2/
Kernel Developer Walkthrough: https://www.youtube.com/watch?v=LORxdO1XUjY
Syscalls, Kernel vs. User Mode and Linux Kernel Source Code: https://www.youtube.com/watch?v=fLS99zJDHOc
How Do Linux Kernel Drivers Work? https://www.youtube.com/watch?v=juGNPLdjLH4
π T-Shirt Series: https://www.youtube.com/playlist?list=PLhixgUqwRTjwy6HCzLfwNzdrSrcrLOM4d
00:00 - Introduction
00:15 - Exploit PoC
00:39 - main()
00:52 - prepare_shellcode()
02:39 - mmap() shared memory to signal "ready" state
03:07 - fork() into [child] and [parent]
03:44 - [parent] wait for the child
04:00 - [child] unveil() loop
05:03 - [parent] ptrace ATTACH and POKE child
05:58 - [child] execve("passwd")
06:38 - [parent] PEEK entrypoint of child in loop
07:34 - [parent] child entrypoint changes!
07:49 - Exploit Walkthrough
09:20 - Root Shell via Shellcode
10:10 - Vulnerability Summary
10:37 - Which UNIX-like Kernel is this?
12:44 - The importance for Security Research
13:59 - Next Video and Resources
14:22 - Patreon and YT Members
-=[ β€οΈ Support ]=-
β per Video: https://www.patreon.com/join/liveoverflow
β per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join
-=[ π Social ]=-
β Twitter: https://twitter.com/LiveOverflow/
β Website: https://liveoverflow.com/
β Subreddit: https://www.reddit.com/r/LiveOverflow/
β Facebook: https://www.facebook.com/LiveOverflow/
-=[ π P.S. ]=-
All links with "*" are affiliate links.
LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm.