Medium severity · published Sep 18, 2023
CVE-2023-42441
Vyper has incorrect re-entrancy lock when key is empty string
5.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VY
vyper · vyperlang
>= 0.2.9, < 0.3.10 · source: vendor, NVD, CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-42441
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-42441
Patch
https://github.com/vyperlang/vyper/commit/0b740280c1e3c5528a20d47b29831948ddcc6d83
Issue Tracking
https://github.com/vyperlang/vyper/pull/3605
Exploit
https://github.com/vyperlang/vyper/security/advisories/GHSA-3hg2-r75x-g69m
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