Incorrect Authorization Affecting vyper package, versions [0.2.15,0.3.1)
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Test your applications- Snyk ID SNYK-PYTHON-VYPER-5825690
- published 8 Aug 2023
- disclosed 7 Aug 2023
- credit Unknown
Introduced: 7 Aug 2023
CVE-2023-39363 Open this link in a new tabHow to fix?
Upgrade vyper to version 0.3.1 or higher.
Overview
vyper is a Pythonic Smart Contract Language for the EVM.
Affected versions of this package are vulnerable to Incorrect Authorization which allows an attacker to cause cross-function re-entrancy in contracts compiled with the susceptible versions by exploiting the incorrect allocation of named re-entrancy locks. This is only exploitable if a .vy contract is compiled with the affected versions; a primary function 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 utilizes the same key and would be affected by the improper state caused by the primary function.