Problems Archive

• 2023-03-22 :: RTACTF 2023 - only-read :: #CTF, #Writeup, #Pwn, #OOB, #BOF, #Canary, #ROP
• 2023-03-13 :: zer0pts CTF 2021 - syscall 777 :: #CTF, #Writeup, #rev, #BPF
• 2023-03-10 :: angstrom CTF 2022 - kevin higgs :: #CTF, #Writeup, #misc, #pickle, #pyjail
• 2023-03-09 :: DownUnderCTF 2022 - click the flag :: #CTF, #Writeup, #rev, #apk
• 2023-03-08 :: SECCON CTF 2021 - pyast64++.rev :: #CTF, #Writeup, #rev
• 2023-03-07 :: DiceCTF @ HOPE - better-llvm :: #CTF, #Writeup, #rev, #Python
• 2023-03-07 :: SECCON CTF 2020 - SCSBX:Reversing :: #CTF, #Writeup, #rev, #VM
• 2022-07-25 :: DiceCTF @ HOPE - small-fortune :: #CTF, #Writeup, #Crypto, #Coppersmith's Attack, #Goldwasser-Micali
• 2022-07-19 :: Imaginary CTF 2022 - Bellcode :: #CTF, #Writeup, #Pwn, #shellcode, #stager
• 2022-07-19 :: Imaginary CTF 2022 - Format String Fun :: #CTF, #Writeup, #Pwn, #FSB
• 2022-07-19 :: Imaginary CTF 2022 - golf :: #CTF, #Writeup, #Pwn, #FSB
• 2022-07-05 :: Google CTF 2022 - Cycling :: #CTF, #Writeup, #Crypto, #RSA, #carmichael_function
• 2022-07-05 :: Google CTF 2022 - Maybe Someday :: #CTF, #Writeup, #Crypto, #Paillier
• 2022-06-27 :: SECCON CTF 2021 - Average Calculator :: #CTF, #Writeup, #Pwn, #Stack Pivot
• 2022-06-22 :: SECCON 2021 CTF - vulnerabilities :: #CTF, #Writeup, #Web, #GO
• 2022-06-19 :: pbctf 2021 - Yet Another PRNG :: #CTF, #Writeup, #Crypto, #RNG, #Lattice
• 2022-06-14 :: TSGCTF 2021 - coffee :: #CTF, #Writeup, #Pwn, #ROP, #FSB, #stack pivot
• 2022-06-09 :: Asian Cyber Security Challenge - Wonderful Hash :: #CTF, #Writeup, #Crypto, #Hash, #Birthday_Attack
• 2022-06-08 :: SECCON Beginners CTF 2022 - OmniRSA :: #CTF, #Writeup, #Crypto, #RSA, #Coppersmith's Attack
• 2022-06-03 :: DiceCTF 2022 - rejected :: #CTF, #Writeup, #Crypto, #LFSR
• 2022-06-01 :: zer0pts CTF 2021 - safe vector :: #CTF, #Writeup, #Pwn, #Heap, #C++
• 2022-06-01 :: InterKosenCTF 2020 - maze :: #CTF, #Writeup, #Web, #Prototype Pollution
• 2022-05-27 :: TetCTF 2022 - fault :: #CTF, #Writeup, #Crypto, #RSA
• 2022-05-26 :: DownUnderCTF 2021 - zap :: #CTF, #Writeup, #Web, #Prototype_Pollution
• 2022-05-24 :: Asian Cyber Security Challenge - CArot :: #CTF, #Writeup, #Pwn, #ROP
• 2022-05-23 :: Asian Cyber Security Challenge - histogram :: #CTF, #Writeup, #Pwn, #OOB, #GOT_Overwrite
• 2022-05-22 :: TetCTF 2022 - shares_v2 :: #CTF, #Writeup, #Crypto, #Lattice
• 2022-05-21 :: TetCTF 2022 - shares :: #CTF, #Writeup, #Crypto, #matrix
• 2022-05-19 :: TSG LIVE! 8 CTF - dns_ropob :: #CTF, #Writeup, #Rev, #ptrace, #gdb
• 2022-05-18 :: TSG LIVE! 8 CTF :: #CTF, #Writeup, #Crypto, #LCG, #RSA
• 2022-05-17 :: Crypto CTF 2021 - Double Miff :: #CTF, #Writeup, #Crypto
• 2022-05-16 :: Midnight Sun CTF Quals 2022 - BabyZK :: #CTF, #Writeup, #Crypto, #lattice
• 2022-05-12 :: Pwn2Win CTF 2021 - t00 rare :: #CTF, #Writeup, #Crypto, #ECDSA, #Baby-Step_Giant-Step_Algorithm
• 2022-05-11 :: Asian Cyber Security Challenge 2021 - Pickle Rick :: #CTF, #Writeup, #Rev, #pickle, #python
• 2022-05-10 :: DiceCTF 2022 - commitment-issue :: #CTF, #Writeup, #Crypto, #RSA, #resultant
• 2022-05-09 :: DiceCTF 2022 - pow-pow :: #CTF, #Writeup, #Crypto
• 2022-05-08 :: RaRCTF 2021 - snore :: #CTF, #Writeup, #Crypto, #schnorr_signature, #lattice, #Hidden_Number_Problem
• 2022-05-07 :: Beginners CTF 2021 - writeme :: #CTF, #Writeup, #Misc, #python
• 2022-05-06 :: redpwn CTF 2019 - genericpyjail, genericpyjail2 :: #CTF, #Writeup, #Misc, #Pwn, #pyjail, #python
• 2022-05-05 :: angstrom CTF 2022 - RSA-AES :: #CTF, #Writeup, #Crypto, #RSA, #Manger's Attack, #Padding Oracle Attack
• 2022-05-05 :: angstrom CTF 2022 - Prophet :: #CTF, #Writeup, #Crypto, #RNG, #Go
• 2022-04-28 :: CODEGATE 2022 - PrimeGenerator :: #CTF, #Writeup, #Crypto, #RSA, #Coppersmith's Attack
• 2022-04-27 :: TSJ CTF 2022 - babyRSA :: #CTF, #Writeup, #Crypto, #RSA, #Coppersmith's Attack
• 2022-04-26 :: Midnight Sun CTF Quals 2022 - Pelle's Rotor-Supported Arithmetic :: #CTF, #Writeup, #Crypto, #RSA
• 2022-04-25 :: b01lers CTF 2022 - Hardcore (Pt. 2) :: #CTF, #Writeup, #Crypto
• 2022-04-23 :: K3RN3LCTF 2021 - Non Square Freedom 1 :: #CTF, #Writeup, #Crypto, #RSA
• 2022-04-22 :: HITCON CTF 2021 - a little easy rsa :: #CTF, #Writeup, #Crypto, #RSA, #Coppersmith's Attack
• 2022-04-22 :: HITCON CTF 2021 - so easy rsa :: #CTF, #Writeup, #Crypto, #RSA, #LCG
• 2022-04-21 :: Crew CTF 2022 - matdlp :: #CTF, #Writeup, #Crypto, #matrix, #DLP
• 2022-04-20 :: RaRCTF 2021 - randompad :: #CTF, #Writeup, #Crypto, #RSA, #Coppersmith's Attack
• 2022-04-19 :: RaRCTF 2021 - PsychECC :: #CTF, #Writeup, #Crypto, #Elliptic Curve, #Invalid Curve Attack
• 2022-04-18 :: Crew CTF 2022 - signsystem :: #CTF, #Writeup, #Crypto, #ECDSA