ecrecover zero-address return unchecked
Sky Lending (formerly MakerDAO)'s assessment for RD-F-019 — scored yellow on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.
Evidence summary #
DAI token permit() checks holder != address(0) before comparing to ecrecover result, providing functional but non-OZ-standard protection. USDS token uses OZ ERC-20PermitUpgradeable (standard-compliant). Core Vat does not use ecrecover.
Sources #
- URLhttps://github.com/sky-ecosystem/dss/blob/master/src/dai.solretrieved 2026-04-27
- https://github.com/sky-ecosystem/usds/blob/master/src/Usds.solretrieved 2026-04-27
Methodology #
Determine whether any `ecrecover` call result is used without a `!= address(0)` guard.
See the full factor methodology and distribution across all protocols →
rubric_version v1.7.0 protocol sky-lending factor RD-F-019 score yellow collected_at 2026-04-28 00:43:18