ctfwriteup
  • ✅/home/ret2basic.eth
  • Game Hacking
    • 👑Pwn Adventure 3: Pwnie Island
      • ✅Prep: Speed Hack
      • ✅Prep: Infinite Health and Mana (Offline)
      • ✅Prep: Analyze Network Packets with Wireshark
      • Prep: Build a Proxy in Python
      • ✅Until the Cows Come Home
      • Unbearable Revenge
      • Pirate's Treasure
    • Cheat Engine Tutorial
      • ✅Step 1: Setup
      • ✅Step 2: Scan for "Exact Value"
      • ✅Step 3: Scan for "Unknown initial value"
      • ✅Step 4: Scan for float and double
      • ✅Step 5: Replace instruction
      • Step 6: Pointer scanning
      • Step 7: Code injection
      • Step 8: Multilevel pointers
      • Step 9: Shared code
  • Web3 CTF
    • 👑Remedy CTF 2025 (Todo)
      • Diamond Heist
      • R vs Q
      • Rich Man's Bet
      • Casino Avengers
      • Frozen Voting
      • Lockdown
      • Proof of Thought
      • Maybe it's unnecessary?
      • Et tu, Permit2?
      • Not a very LUCKY TOKEN
      • risc4
      • HealthCheck as a Service
      • Restricted Proxy
      • Unstable Pool
      • Opaze Whisperer
      • "memorable" onlyOwner
      • World of Memecraft
      • Copy/Paste/Deploy
      • Peer-to-peer-to-me
      • Joe's Lending Mirage
      • Tokemak
      • OFAC Executive Order 13337
    • 👑Paradigm CTF 2023 (Todo)
      • Oven
      • Dragon Tyrant
    • Damn Vulnerable DeFi
      • ✅Unstoppable
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      • ✅Truster
      • ✅Side Entrance
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      • ✅Puppet
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      • ✅Free Rider
      • Backdoor
      • Climber
      • Wallet Mining (Todo)
      • Puppet V3 (Todo)
      • ABI Smuggling (Todo)
    • Milotruck Challs
      • ✅Greyhats Dollar
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    • Secureum AMAZEX DSS Paris
      • ✅Operation magic redemption
      • Mission Modern WETH: Rescue the Ether
      • LendEx pool hack
      • Operation Rescue POSI Token!
      • Balloon Vault
      • Safe Yield?
      • ✅Crystal DAO
      • ✅Liquidatoooor
    • ✅Ethernaut
      • ✅Hello Ethernaut
      • ✅Fallback
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      • ✅Coin Flip
      • ✅Telephone
      • ✅Token
      • ✅Delegation
      • ✅Force
      • ✅Vault
      • ✅King
      • ✅Re-entrancy
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      • ✅Gatekeeper One
      • ✅Gatekeeper Two
      • ✅Naught Coin
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      • ✅MagicNumber
      • ✅Alien Codex
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      • ✅DEX Two
      • ✅Puzzle Wallet
      • Motorbike
      • DoubleEntryPoint
      • ✅Good Samaritan
      • Gatekeeper Three
      • Switch
    • ✅Flashbots MEV-Share CTF
    • ✅Capture the Ether
      • ✅Lotteries
      • ✅Math
      • ✅Miscellaneous
    • ✅EVM Puzzles
      • ✅Puzzle 1
      • ✅Puzzle 2
      • ✅Puzzle 3
      • ✅Puzzle 4
      • ✅Puzzle 5
      • ✅Puzzle 6
      • ✅Puzzle 7
      • ✅Puzzle 8
      • ✅Puzzle 9
      • ✅Puzzle 10
    • ✅More EVM Puzzles
      • ✅Puzzle 1
      • ✅Puzzle 2
      • ✅Puzzle 3
      • ✅Puzzle 4
      • ✅Puzzle 5
      • ✅Puzzle 6
      • ✅Puzzle 7
      • ✅Puzzle 8
      • ✅Puzzle 9
      • ✅Puzzle 10
    • ✅QuillCTF
      • ✅MetaToken
      • ✅Temporary Variable
      • KeyCraft
      • ✅Lottery
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      • Voting Machine
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      • PseudoRandom
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      • Slot Puzzle
      • Moloch's Vault
      • ✅Donate
      • ✅WETH-11
      • Panda Token
      • Gate
      • ✅WETH10
      • ✅Pelusa
      • ✅True XOR
      • ✅Collatz Puzzle
      • ✅D31eg4t3
      • ✅Safe NFT
      • ✅VIP Bank
      • ✅Confidential Hash
      • ✅Road Closed
    • ✅unhacked
      • ✅reaper
  • RareSkills Puzzles
    • Solidity Exercises
    • Solidity Riddles
    • Yul Puzzles
      • ✅01 - ReturnBool
      • ✅02 - SimpleRevert
      • ✅03 - Return42
      • ✅04 - RevertWithError
      • ✅05 - RevertWithSelectorPlusArgs
      • 06 - RevertWithPanic
    • Huff Puzzles
    • Uniswap V2 Puzzles
    • Zero Knowledge Puzzles
  • Web2 CTF
    • Grey Cat CTF 2024
      • ✅Web Challs
    • pwn.college
      • Introduction
        • What is Computer Systems Security?
      • Program Interaction
        • Linux Command Line
        • 🚩embryoio
      • Program Misuse
        • Privilege Escalation
        • Mitigations
        • 🚩babysuid
      • Assembly Refresher
        • x86 Assembly
        • 🚩embryoasm
      • Shellcoding
        • Introduction
        • Common Challenges
        • Data Execution Prevention
        • 🚩babyshell
      • Sandboxing
        • chroot
        • seccomp
        • Escaping seccomp
        • 🚩babyjail
      • Debugging Refresher
        • x86 Assembly
        • 🚩embryogdb
      • Binary Reverse Engineering
        • Functions and Frames
        • Data Access
        • Static Tools
        • Dynamic Tools
        • Real-world Applications
        • 🚩babyrev
      • Memory Errors
        • High-Level Problems
        • Smashing the Stack
        • Causes of Corruption
        • Canary
        • ASLR
        • Causes of Disclosure
        • 🚩babymem
      • Exploitation
        • Introduction
        • Hijacking to Shellcode
        • Side Effects
        • JIT Spray
        • 🚩toddler1
      • Return Oriented Programming
        • Binary Lego
        • Techniques
        • Complications
        • 🚩babyrop
      • Dynamic Allocator Misuse
        • What is the Heap?
        • Dangers of the Heap
        • tcache
        • Chunks and Metadata
        • Metadata Corruption
        • 🚩babyheap
      • Race Conditions
        • Introduction
        • Races in the Filesystem
        • 🚩babyrace
      • Kernel Security
        • Environment Setup
        • Kernel Modules
        • Privilege Escalation
        • 🚩babykernel
      • Advanced Exploitation
        • toddler2
    • pwnable.kr
      • fd
      • collision
      • bof
      • flag
      • passcode
      • random
      • input
      • leg
      • mistake
      • shellshock
      • coin1
      • blackjack
      • lotto
      • cmd1
      • cmd2
      • uaf
      • memcpy
      • asm
      • unlink
      • blukat
      • horcruxes
    • ROP Emporium
      • ret2win
      • split
      • callme
      • write4
      • pivot
    • ✅Jarvis OJ Pwn Xman Series
    • ✅Jarvis OJ Crypto RSA Series
    • ✅picoMini by redpwn
      • Binary Exploitation
      • Reverse Engineering
      • Cryptography
      • Web Exploitation
      • Forensics
    • ✅picoCTF 2021
      • Reverse Engineering
      • Web Exploitation
      • Forensics
    • ✅picoCTF 2020 Mini-Competition
  • Red Teaming
    • vulnlab
      • Active Directory Chains
        • ✅Trusted (Easy)
        • Hybrid (Easy)
        • Lustrous (Medium)
        • Reflection (Medium)
        • Intercept (Hard)
      • Red Team Labs
        • Wutai (Medium)
        • Shinra (Hard)
    • Hack The Box
      • AD
        • Intelligence
        • Pivotapi
        • Sharp
        • Monteverde
        • Resolute
        • Endgame: P.O.O.
        • Forest
        • Sauna
        • Active
        • Blackfield
      • ✅Linux
        • ✅Safe (Easy)
        • ✅Delivery (Easy)
        • ✅TheNotebook (Medium)
        • ✅Brainfuck (Insane)
    • TCM Windows Privilege Escalation Course
      • ✅Hack The Box - Chatterbox (Medium)
      • Hack The Box - SecNotes (Medium)
    • ✅TCM Linux Privilege Escalation Course
      • ✅TryHackMe - Simple CTF (Easy)
      • ✅TryHackMe - Vulnversity (Easy)
      • ✅TryHackMe - CMesS (Medium)
      • ✅TryHackMe - UltraTech (Medium)
      • ✅TryHackMe - LazyAdmin (Easy)
      • ✅TryHackMe - Anonymous (Medium)
      • ✅TryHackMe - tomghost (Easy)
      • ✅TryHackMe - ConvertMyVideo (Medium)
      • ✅TryHackMe - Brainpan 1 (Hard)
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  • Challenge
  • Code Review
  • Solution
  • Exploit
  1. Web2 CTF
  2. pwnable.kr

shellshock

{"author": ["ret2basic"]}

Challenge

Code Review

Solution

Exploit

PreviousmistakeNextcoin1

Last updated 3 years ago