Safety vulnerability ID: 62837
The information on this page was manually curated by our Cybersecurity Intelligence Team.
[This advisory has been limited. Please create a free account to view the full advisory.]
Latest version: 0.4.1
Vyper: the Pythonic Programming Language for the EVM
[This affected versions has been limited. Please create a free account to view the full affected versions.]
[This fixed versions has been limited. Please create a free account to view the full fixed versions.]
Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). Contracts containing large arrays might underallocate the number of slots they need by 1. Prior to v0.3.8, the calculation to determine how many slots a storage variable needed used `math.ceil(type_.size_in_bytes / 32)`. The intermediate floating point step can produce a rounding error if there are enough bits set in the IEEE-754 mantissa. Roughly speaking, if `type_.size_in_bytes` is large (> 2**46), and slightly less than a power of 2, the calculation can overestimate how many slots are needed by 1. If `type_.size_in_bytes` is slightly more than a power of 2, the calculation can underestimate how many slots are needed by 1. This issue is patched in version 0.3.8. See CVE-2023-46247.
MISC:https://github.com/vyperlang/vyper/blob/6020b8bbf66b062d299d87bc7e4eddc4c9d1c157/vyper/semantics/validation/data_positions.py#L197: https://github.com/vyperlang/vyper/blob/6020b8bbf66b062d299d87bc7e4eddc4c9d1c157/vyper/semantics/validation/data_positions.py#L197
MISC:https://github.com/vyperlang/vyper/commit/0bb7203b584e771b23536ba065a6efda457161bb: https://github.com/vyperlang/vyper/commit/0bb7203b584e771b23536ba065a6efda457161bb
MISC:https://github.com/vyperlang/vyper/security/advisories/GHSA-6m97-7527-mh74: https://github.com/vyperlang/vyper/security/advisories/GHSA-6m97-7527-mh74
Scan your Python project for dependency vulnerabilities in two minutes
Scan your application