Unchecked Return Value Affecting vyper package, versions [,0.3.10rc1)
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Test your applications- Snyk ID SNYK-PYTHON-VYPER-5805377
- published 26 Jul 2023
- disclosed 26 Jul 2023
- credit Unknown
Introduced: 26 Jul 2023
CVE-2023-37902 Open this link in a new tabHow to fix?
Upgrade vyper to version 0.3.10rc1 or higher.
Overview
vyper is a Pythonic Smart Contract Language for the EVM.
Affected versions of this package are vulnerable to Unchecked Return Value such that the ecrecover precompile does not fill the output buffer if the signature does not verify. However, the ecrecover builtin will still return whatever is at memory location 0. This means that if the compiler has been convinced to write to the 0 memory location with specially crafted data (generally, this can happen with a hashmap access or immutable read) just before the ecrecover, a signature check might pass on an invalid signature.