Playing Ethernaut manually and with security tools.

Links:

• Ethernaut (The CTF)
• Foundry (To install, DApp framework, manual exploits)
• Slither (To install, Static Analyse), detecting vulnerabilities)
• Echidna (To install, Fuzzing, finding bugs with property testing)
• Manticore (To install, Symbolic Execution, finding sequences of actions leading to exploit)

Commands:

• (Foundry) Run all manual exploits:

forge test

• (Foundry) Run single manual exploit:

forge test --match-contract Fallback

• (Slither) Log contract vulnerabilities:

slither src/1_Fallback/Fallback.sol

• (Echidna) Find bug (assuming Echidna binaries located at home):

~/echidna-test ./src/1_Fallback/EchidnaFallback.sol --config ./src/1_Fallback/echidna_config.yaml

• (Manticore) Log list of exploit TX series (attacker executed withdraw) from pre-computed results:

grep withdraw src/1_Fallback/mcore_cli_result/*.tx

• (Manticore) Log details from single exploit TX set:

cat src/1_Fallback/mcore_cli_result/user_00000008.tx

• (Manticore) Find exploit series by exploring all contract states (time consuming):

cd src/1_Fallback/ && manticore Fallback.sol && cd ../..

• (Manticore) Find exploit while providing constraints:

cd src/1_Fallback/ && python3 manticore_fallback.py && cd ../..