| Package | Affected versions | Patched versions |
|---|---|---|
| vyper | < 0.3.0 | 0.3.0 |
| vyper | < 0.3.0 | 0.3.0 |
Prior to v0.3.0, __default__() functions did not respect the @nonreentrancy decorator and the lock was not emitted. This is a known bug and was already visible in the issue tracker (https://github.com/vyperlang/vyper/issues/2455), but it is being re-issued as an advisory so that tools relying on the advisory publication list can incorporate it into their searches.
A contract search was additionally performed and no vulnerable contracts were found in production.
@external
@payable
@nonreentrant("default")
def __default__():
pass
after codegen:
[seq,
[if, [lt, calldatasize, 4], [goto, fallback]],
[mstore, 28, [calldataload, 0]],
[with, _func_sig, [mload, 0], seq],
[seq_unchecked,
[label, fallback],
[seq,
pass,
# Line 5
pass,
pass,
# Line 4
stop]]],
No vulnerable production contracts were found. Additionally, using a lock on a default function is a very sparsely used pattern. As such, the impact is low.
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free