Ractf 2020
76 challenges with 155 published solutions between them. The writeups for this event were found in public repositories. Each link is pinned to the commit it was read from.
Where these writeups liveUncategorised27
The upstream scoreboard did not say, so neither do we.
A Monster Issue
4 official solutionsAlso written up in: PWN-to-0xE4/Writeups, turnipsoup/ctfwriteups, bantahacka/CTF-Writeups, TheWinRaRs/Writeups
Finches In A Pie
4 official solutionsAlso written up in: PWN-to-0xE4/Writeups, crypt0n1te/Write-Ups, das-12/write-ups, TheWinRaRs/Writeups
Finches In A Stack
4 official solutionsAlso written up in: PWN-to-0xE4/Writeups, crypt0n1te/Write-Ups, das-12/write-ups, TheWinRaRs/Writeups
Cut Short
3 official solutionsAlso written up in: PWN-to-0xE4/Writeups, turnipsoup/ctfwriteups, bantahacka/CTF-Writeups
Dimensionless Loading
3 official solutionsAlso written up in: PWN-to-0xE4/Writeups, turnipsoup/ctfwriteups, TheWinRaRs/Writeups
Also written up in: datajerk/ctf-write-ups, datajerk/ctf-write-ups, fr0st61te/ctf
Also written up in: datajerk/ctf-write-ups, datajerk/ctf-write-ups, fr0st61te/ctf
Also written up in: datajerk/ctf-write-ups, datajerk/ctf-write-ups, fr0st61te/ctf
Peculiar Packet Capture
3 official solutionsAlso written up in: PWN-to-0xE4/Writeups, turnipsoup/ctfwriteups, bantahacka/CTF-Writeups
A Musical Mix up
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, TheWinRaRs/Writeups
Access Granted
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, TheWinRaRs/Writeups
Cheap Facades
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, TheWinRaRs/Writeups
Eccentric Encryption Enigma
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, TheWinRaRs/Writeups
in a Flash
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, bantahacka/CTF-Writeups
Medea
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, TheWinRaRs/Writeups
A Flash of Inspiration
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Also written up in: Sh3llcod3/CTF-Challenges
Finding Server Info
1 official solutionAlso written up in: spenceman1013/CTF-writeups
Memorable Listing
1 official solutionAlso written up in: spenceman1013/CTF-writeups
Packet Capture
1 official solutionAlso written up in: spenceman1013/CTF-writeups
Puffer Overflow
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Quarantine Hidden
1 official solutionAlso written up in: spenceman1013/CTF-writeups
Also written up in: Taflaxx/writeups
Also written up in: Taflaxx/writeups
Snakes and Ladders
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
SolvedInAFlash
1 official solutionAlso written up in: Flab-E/ctf-writeups
Witty Name
1 official solutionAlso written up in: spenceman1013/CTF-writeups
Cryptography15
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
Mysterious Masquerading Message
5 official solutionsAlso written up in: PWN-to-0xE4/Writeups, bantahacka/CTF-Writeups, crypt0n1te/Write-Ups, das-12/write-ups, TheWinRaRs/Writeups
Also written up in: PWN-to-0xE4/Writeups, bantahacka/CTF-Writeups
B007L36 CRYP70... 4641N
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, TheWinRaRs/Writeups
Really Secret Algorithm
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, TheWinRaRs/Writeups
Really Speedy Algorithm
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, TheWinRaRs/Writeups
Also written up in: PWN-to-0xE4/Writeups
Also written up in: PWN-to-0xE4/Writeups
Also written up in: PWN-to-0xE4/Writeups
Also written up in: PWN-to-0xE4/Writeups
Also written up in: PWN-to-0xE4/Writeups
Access 0000
1 official solutionAlso written up in: TheWinRaRs/Writeups
B007l3G CRYP70
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
It's as easy as access=0000
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Really Simple algorithm
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Really Small Algorithm
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Web13
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
Admin Attack
6 official solutionsAlso written up in: 0x8LayerTeam/CTF-Writeups, PWN-to-0xE4/Writeups, spenceman1013/CTF-writeups, 0x8Layer/CTF-Writeups, crypt0n1te/Write-Ups, das-12/write-ups
Quarantine
5 official solutionsAlso written up in: PWN-to-0xE4/Writeups, spenceman1013/CTF-writeups, crypt0n1te/Write-Ups, das-12/write-ups, TheWinRaRs/Writeups
Finding server information
4 official solutionsAlso written up in: 0x8LayerTeam/CTF-Writeups, PWN-to-0xE4/Writeups, 0x8Layer/CTF-Writeups, TheWinRaRs/Writeups
C0llide?
3 official solutionsAlso written up in: 0x8LayerTeam/CTF-Writeups, PWN-to-0xE4/Writeups, 0x8Layer/CTF-Writeups
Getting admin
3 official solutionsAlso written up in: PWN-to-0xE4/Writeups, spenceman1013/CTF-writeups, TheWinRaRs/Writeups
Insert witty name
3 official solutionsAlso written up in: 0x8LayerTeam/CTF-Writeups, PWN-to-0xE4/Writeups, 0x8Layer/CTF-Writeups
Baiting
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, spenceman1013/CTF-writeups
Entrypoint
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, spenceman1013/CTF-writeups
quarantineHiddenInfo
2 official solutionsAlso written up in: srixivas/SecurityNuggets, Srinivas11789/SecurityNuggets
Collide
1 official solutionAlso written up in: TheWinRaRs/Writeups
Quarantine Hidden information
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Vandalism
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Xtremely Memorable Listing
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Misc13
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Spentalkux
5 official solutionsAlso written up in: PWN-to-0xE4/Writeups, spenceman1013/CTF-writeups, crypt0n1te/Write-Ups, das-12/write-ups, TheWinRaRs/Writeups
Br.Mov
4 official solutionsAlso written up in: datajerk/ctf-write-ups, PWN-to-0xE4/Writeups, crypt0n1te/Write-Ups, das-12/write-ups
Not Really AI
3 official solutionsAlso written up in: PWN-to-0xE4/Writeups, rogeriobastos/ctf-write-ups, TheWinRaRs/Writeups
Mad CTF Disease
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, bantahacka/CTF-Writeups
Pearlpearlpearl
2 official solutionsAlso written up in: PWN-to-0xE4/Writeups, TheWinRaRs/Writeups
Discord
1 official solutionAlso written up in: TheWinRaRs/Writeups
EmojASM
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Emojiasm
1 official solutionAlso written up in: TheWinRaRs/Writeups
NS.MOV
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Reading Between the Lines
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Return of the EmojASM
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
ST.MOV
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Teleport
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
OSINT6
Answer a question about the real world from public sources. The work is pivoting between identifiers, not exploiting anything.
RAirways
4 official solutionsAlso written up in: PWN-to-0xE4/Writeups, spenceman1013/CTF-writeups, crypt0n1te/Write-Ups, das-12/write-ups
RemoteRetreat
3 official solutionsAlso written up in: PWN-to-0xE4/Writeups, Flab-E/ctf-writeups, spenceman1013/CTF-writeups
Tree Man
3 official solutionsAlso written up in: PWN-to-0xE4/Writeups, spenceman1013/CTF-writeups, TheWinRaRs/Writeups
Brick by Brick
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Dead Man
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Suspended Belief
1 official solutionAlso written up in: PWN-to-0xE4/Writeups
Forensics2
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
Disk Forensics Fun
4 official solutionsAlso written up in: PWN-to-0xE4/Writeups, crypt0n1te/Write-Ups, das-12/write-ups, TheWinRaRs/Writeups
MusicalMixUp
3 official solutionsAlso written up in: Flab-E/ctf-writeups, crypt0n1te/Write-Ups, das-12/write-ups