CVE - CVE-2023-46247

CVE-ID
CVE-2023-46247	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://github.com/vyperlang/vyper/blob/6020b8bbf66b062d299d87bc7e4eddc4c9d1c157/vyper/semantics/validation/data_positions.py#L197 URL:https://github.com/vyperlang/vyper/blob/6020b8bbf66b062d299d87bc7e4eddc4c9d1c157/vyper/semantics/validation/data_positions.py#L197 MISC:https://github.com/vyperlang/vyper/commit/0bb7203b584e771b23536ba065a6efda457161bb URL:https://github.com/vyperlang/vyper/commit/0bb7203b584e771b23536ba065a6efda457161bb MISC:https://github.com/vyperlang/vyper/security/advisories/GHSA-6m97-7527-mh74 URL:https://github.com/vyperlang/vyper/security/advisories/GHSA-6m97-7527-mh74
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20231019	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20231019)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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