I tried my hand at exploiting an nday on the Google Container Optimized OS instance in kCTF but sadly was very late to the party. Here is my exploit write-up for it. I learned a lot during the process, let me know what you think. I'll post TL;DR in thread.

switching chatgpt to deep research mode: why does my tummy hurt?.

RT @chesscom: An important update.

RT @andreyknvl: Schedule for my Fuzzing/Exploiting the Linux Kernel trainings for the rest of the year ⬇️.

exploit drops me into a root shell: yeah i dunno, still not sure this is a bug, im probably missing something.

RT @TheTNHoller: There is no bottom.

RT @TheOnion: RFK Jr.: Vaccines No More Effective Than Drinking Horseshoe Crab Blood Straight

🤣.

RT @marketplunger1:

save doxygen comment time by making every function void func(void);, just use globals, its fine.

RT @u1f383: A bit late, but I just published my blog post on bypassing Ubuntu’s sandbox! Hope you enjoy it!.

how i picture linux kernel VR:.- learning about CPU sidechannels.- learning about required primitives to bypass Google mitigations.- auditing complicated surfaces for exploitable bugs.- brainstorming exploit strats with friends. what it actually is:.- getting netlink libs to work.

RT @cor_ctf: Exploit write-ups for our 🚨latest 0-day🚨and the tragedy that swept the red black tree family dropping soon 👀. Here is a tiktok….

RT @PabloReports: The man's name is Narisco Barranco, a California landscaper. His oldest son is a Marine who served in Afghanistan. His….

RT @offlinemark: week 73, streaming kernel dev right now. topic: EFI Boot. last week we got booting with limine working. continuing the boo….

RT @binarygolf: BGGP6 will happen fall/winter 2025 instead of our usual summer event! Stay tuned for more details.

RT @richinseattle: High praise from the titan of security research @bsdaemon! Thank you Rodrigo, was my pleasure to spend the week with you….

RT @SuperFashi1: i created a pretty hard (and interesting, imo) rev+misc chall for the upcoming ierae ctf. please try it out .

__sys_sendmsg -> ___sys_sendmsg -> ____sys_sendmsg, wtf

grok, why did my wife leave me?.

chill bro