Crusaders of Rust
@cor_ctf
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A European and American Security Research Group
Joined February 2021
We at CoR (+ @u1f383) had a great experience at @hexacon_fr this weekend Met many skilled VR people, the venue was amazing, and the speaker gifts were simply🔥 Best offensive security conference we have seen so far - thanks again to the organizers for the opportunity!
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An RbTree Family Drama: Exploiting a Linux Kernel 0-day Through Red-Black Tree Transformations by William Liu and Savino Dicanosa
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Wanna learn how to perform OOP in functional programming all in Google Sheets? Come check out our team member @MaxCai33447144 research, which he made into a corCTF 2025 challenge! https://t.co/Nj709JiLyp
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We have a🔥presentation ready for Hexacon. Come grab a beer with us afterwards! See everyone in Paris🇫🇷🫡
📢 An RbTree Family Drama: Exploiting a Linux Kernel 0-day Through Red-Black Tree Transformations by William Liu & Savino Dicanosa
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Say hello to Eternal Tux🐧, a 0-click RCE exploit against the Linux kernel from KSMBD N-Days (CVE-2023-52440 & CVE-2023-4130) https://t.co/Cbk9MBo91v Cheers to @u1f383 for finding these CVEs + the OffensiveCon talk from gteissier & @laomaiweng for inspiration!
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Check out our teammate's retrospective on his kernel fuzzing summer: https://t.co/Gnl51l4j6F It covers a net/sched fuzzing quirk (inspiring HangBuzz101 in corCTF), and summarizes the kernelCTF adventures of our team. Another really cool exploit write-up will drop this Sunday 👀
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For corCTF2025 our teammate D3vil ( https://t.co/cGEhvUku0w) wrote an Android kernel pwn. Congrats to @u1f383 for the only solve! Make sure to read his writeup!
syst3mfailure.io
Low Level Software Exploitation
Last weekend, I participated in corCTF and solved the Android Pwn challenge - corphone. It was a great challenge, and I learned a lot from it. Here's my write-up :) https://t.co/nFtkSjFzyW
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We recently claimed the cos-113 slot with an exploit for CVE-2024-58240😎 A backport for an exploitable UAF was missed for 6.1.x for the past 1.5 years🧐 Maybe when we have healed from our recent 100k bug bounty typo will we tell the full story🤪
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Per tradition, corCTF rev is just VM rev. Check out these 2 author writeups about VM rev from @MaxCai33447144, our new reverse engineer lead! https://t.co/r4vSv32ROw
https://t.co/Djh3mazJlh
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Come check out our author writeup for corctf-challenge-dev-2 from Drakon: https://t.co/OB9Pw6PIU4 Timing side-channel attack against Chromium extensions😎
cor.team
corCTF 2025 - corctf-challenge-dev-2 At this point this website might as well be my personal blog, given that I’m the only one that’s still posting to it, apparently. Anyway, corCTF 2025 just ended....
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corCTF 2025 has ended! Congrats to the top 5: 1. @FlatNetworkOrg 2. @r3kapig @ProjectSEKAIctf 3. The Amazing Digital Orange 4. @TheRomanXpl0it 5. STM Thank you to all of our players and sponsors! @osec_io, Research Innovations, @ret2systems, @trailofbits, @vector35, @googlecloud
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24 hours left in corCTF! Come play if you haven't already, and let's see if there are any big moves in the final day 👀 Our final challenge wave will be dropping shortly.
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Online Safety Act getting in your way? Win £50 or a year of NordVPN in misc/england. Come play corCTF 2025, only 42 more hours to go!
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corCTF 2025 begins in an hour! Come register at https://t.co/vR7bvxHy6x 😎 We have everything from easy challenges to an AMD uarch attack, a web service 0-day, and an Android LPE exploit👀
2025.cor.team
Play corCTF 2025, a cybersecurity competition by the Crusaders of Rust! Solve binary exploitation, cryptography, forensics, reversing, and web challenges. Join our disCoRd server: https://discord.c...
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On your marks, set, pwn in 24 hours!🚩 Come register for corCTF 2025 at https://t.co/vR7bvxHy6x 😎, our prize pool is over 10k USD🤑
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Last year our Windows challenge went unreleased due to infra issues (surprise surprise, M$ products are a pain to deal with)... but this year, it's redemption! If you want to try out 2 Windows pwns, mark your calendars for corCTF and register at https://t.co/vR7bvxHy6x😎
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Registration for corCTF 2025 is up🚩 https://t.co/o2Js9mkyzv Mark your calendars for August 30th to September 1st!
2025.cor.team
Play corCTF 2025, a cybersecurity competition by the Crusaders of Rust! Solve binary exploitation, cryptography, forensics, reversing, and web challenges. Join our disCoRd server: https://discord.c...
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Get ready to reverse-engineer our pure object-oriented programming language, compiling into a pure google sheets functional paradigm! Get ready for corCTF 2025🔥
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💰corCTF 2025 PRIZES💰 1st: - $3000 2nd: - $2000 3rd: - $1337 4th: - $800 5th: - $500 Top 5 teams: Binja Personal License Top 10 teams: RET2 Wargame Token Up to $1000 prize pool for bloods and writeups. Get ready to pwn at 8/30 UTC midnight👀
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We came 3rd at this year's DEFCON CTF Finals as @SuperDiceCode! Thanks to @SuperGuesser , CodeRed, and @SquidProxyLover for playing with us, and @Nautilus_CTF for organising.
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