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2.2 KiB
2.2 KiB
Smart Contract Security Issues
Issue | Description | Mythril Detection Module(s) | References |
---|---|---|---|
Unprotected functions | Critical functions such as sends with non-zero value or suicide() calls are callable by anyone, or msg.sender is compared against an address in storage that can be written to. E.g. Parity wallet bugs. | unchecked_suicide, ether_send | |
Missing check on CALL return value | unchecked_retval | Handle errors in external calls | |
Re-entrancy | call to untrusted contract with gas | ||
Multiple sends in a single transaction | External calls can fail accidentally or deliberately. Avoid combining multiple send() calls in a single transaction. | Favor pull over push for external calls¶ | |
Function call to untrusted contract | call to untrusted contract with gas | ||
Delegatecall or callcode to untrusted contract | delegatecall_forward, delegatecall_to_dynamic.py | ||
Integer overflow/underflow | integer_underflow | ||
Type confusion | |||
Predictable RNG | |||
Transaction order dependence | |||
Timestamp dependence | |||
Information exposure | |||
Payable transaction does not revert in case of failure | |||
Call depth attack |