Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). In versions 0.2.15, 0.2.16 and 0.3.0, named re-entrancy locks are allocated incorrectly. Each function using a named re-entrancy lock gets a unique lock regardless of the key, allowing cross-function re-entrancy in contracts compiled with the susceptible versions. A specific set of conditions is required to result in misbehavior of affected contracts, specifically: a `.vy` contract compiled with `vyper` versions `0.2.15`, `0.2.16`, or `0.3.0`; a primary function that utilizes the `@nonreentrant` decorator with a specific `key` and does not strictly follow the check-effects-interaction pattern (i.e. contains an external call to an untrusted party before storage updates); and a secondary function that utilizes the same `key` and would be affected by the improper state caused by the primary function. Version 0.3.1 contains a fix for this issue.
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History
Fri, 11 Oct 2024 14:15:00 +0000
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cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2023-08-07T18:40:25.615Z
Updated: 2024-10-11T14:05:03.824Z
Reserved: 2023-07-28T13:26:46.480Z
Link: CVE-2023-39363
Vulnrichment
Updated: 2024-08-02T18:10:20.307Z
NVD
Status : Modified
Published: 2023-08-07T19:15:11.873
Modified: 2024-11-21T08:15:14.707
Link: CVE-2023-39363
Redhat
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