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Medium · 5.3 CVE-2024-32647 EUVD-2024-0184GHSA-3whq-64q2-qfj6PYSEC-2024-208

vyper performs double eval of raw_args in create_from_blueprint

Published Apr 25, 2024 · Updated Aug 2, 2024 · Assigned by GitHub_M

Description

Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the `create_from_blueprint` builtin can result in a double eval vulnerability when `raw_args=True` and the `args` argument has side-effects. It can be seen that the `_build_create_IR` function of the `create_from_blueprint` builtin doesn't cache the mentioned `args` argument to the stack. As such, it can be evaluated multiple times (instead of retrieving the value from the stack). No vulnerable production contracts were found. Additionally, double evaluation of side-effects should be easily discoverable in client tests. As such, the impact is low. As of time of publication, no fixed versions exist.

Affected products

VendorProductAffectedFixed
vyperlang vyper <= 0.3.10 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI vyper < 0.4.0 0.4.0 GHSA-3whq-64q2-qfj6

References