CVE-2023-30629 Information

Description

Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions 0.3.1 through 0.3.7 the Vyper compiler generates the wrong bytecode. Any contract that uses the raw_call with revert_on_failure=False and max_outsize=0 receives the wrong response from raw_call. Depending on the memory garbage the result can be either True or False. A patch is available and as of time of publication anticipated to be part of Vyper 0.3.8. As a workaround one may always put max_outsize>0.

Reference

https://docs.vyperlang.org/en/v0.3.7/built-in-functions.html#raw_call https://github.com/lidofinance/gate-seals/pull/5/files https://github.com/lidofinance/gate-seals/blob/051593e74df01a4131c485b4fda52e691cd4b7d8/contracts/GateSeal.vy#L164 https://github.com/vyperlang/vyper/security/advisories/GHSA-w9g2-3w7p-72g9 https://github.com/vyperlang/vyper/commit/851f7a1b3aa2a36fd041e3d0ed38f9355a58c8ae