Problems for LyonCTF Main Contest


Problem Types Points
Sanity Check General 1
Seasick Cookies Cryptography 50
Short XOR Cryptography 75
Mathematics in Switzerland Cryptography 100
Standard RSA Cryptography 100
Steven's Secret Sharing (Easy) Cryptography 200
Steven's Secret Sharing (Hard) Cryptography 400
Custom RSA Cryptography 400
First Contact 1: Attacked Forensics 50
First Contact 2: Origins Forensics 150
First Contact 3: Fix Forensics 100
First Contact 4: Directions Forensics 125
First Contact 5: Infra Forensics 200
First Contact 6: Capture Forensics 300
Train Thing Forensics 100
Pyra Forensics 275
cr Forensics, Cryptography 325
Snake 1 Reverse Engineering 50
Back to Math Reverse Engineering 100
Snake 2 Reverse Engineering 150
Snake 3 Reverse Engineering 300
Joshua's Anger Challenge Reverse Engineering 500
Connections Web Exploitation 50
Nom Nom Nom Web Exploitation 50
Humans Web Exploitation 50
Hidden Txt Web Exploitation 75
Emoji Search Web Exploitation 150
Spooky Action from the Backend Web Exploitation 200
guess Web Exploitation 200
expy Web Exploitation 300
trivial Web Exploitation 400
Baby Buffer Overflow Binary Exploitation 50
Baby ret2win Binary Exploitation 75
Baby Cookie Binary Exploitation 100
vgpass Binary Exploitation 100
Baby ret2libc Binary Exploitation 125
Exfil Me Binary Exploitation 400
ROPuzzle V3 Binary Exploitation 400
CS 146 Binary Exploitation 400