Vyper has incorrect re-entrancy lock when key is empty string
CVE-2023-42441

5.3MEDIUM

Key Information:

Vendor

Vyperlang

Status
Vyper
Vendor
CVE Published:
18 September 2023

What is CVE-2023-42441?

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.

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Affected Version(s)

vyper >= 0.2.9, < 0.3.10

References

https://github.com/vyperlang/vyper/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/vyperlang/vyper/pull/3605
x_refsource_MISC
https://github.com/vyperlang/vyper/commit/0b740280c1e3c55...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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