medium4.8
CVE-2021-48019
Vyper before 0.2.9 deploys forwarder proxies through the built-in create_forwarder_to function that report a fixed 4096-byte RETURNDATASIZE rather than the act…
Impact
Vyper before 0.2.9 deploys forwarder proxies through the built-in create_forwarder_to function that report a fixed 4096-byte RETURNDATASIZE rather than the actual return data size. Calls through these proxies can yield corrupted data when a function returns more than 4096 bytes without return data sanitation, and fail strict return-size checks such as SafeERC20.safeTransfer.
Affected products
| Product | Affected versions |
|---|---|
| Vyper | before 0.2.9 |
Versions were read from the advisory text. No structured product data has been published for this record yet.