CVE-2023-42441

Public Exploit
Vyper has incorrect re-entrancy lock when key is empty string

Description

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). Starting in version 0.2.9 and prior to version 0.3.10, locks of the type `@nonreentrant("")` or `@nonreentrant('')` do not produce reentrancy checks at runtime. This issue is fixed in version 0.3.10. As a workaround, ensure the lock name is a non-empty string.

Categories

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.15%
Vendor Advisory github.com
Affected: vyperlang vyper
Published at:
Updated at:

References

Link Tags
https://github.com/vyperlang/vyper/security/advisories/GHSA-3hg2-r75x-g69m exploit patch vendor advisory
https://github.com/vyperlang/vyper/pull/3605 issue tracking patch
https://github.com/vyperlang/vyper/commit/0b740280c1e3c5528a20d47b29831948ddcc6d83 patch

Frequently Asked Questions

What is the severity of CVE-2023-42441?
CVE-2023-42441 has been scored as a medium severity vulnerability.
How to fix CVE-2023-42441?
To fix CVE-2023-42441, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-42441 being actively exploited in the wild?
It is possible that CVE-2023-42441 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-42441?
CVE-2023-42441 affects vyperlang vyper.
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