Vulnerability · Published Apr 25, 2024 · Assigned by GitHub_M

CVE-2024-32648vyper default functions don't respect nonreentrancy keys

Medium 5.3

In plain English

A medium-severity security flaw in vyper from vyperlang. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 63.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. Prior to version 0.3.0, default functions don't respect nonreentrancy keys and the lock isn't emitted. No vulnerable production contracts were found. Additionally, using a lock on a `default` function is a very sparsely used pattern. As such, the impact is low. Version 0.3.0 contains a patch for the issue.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	vyper	0.3.0	GHSA-m2v9-w374-5hj9
PyPI	vyper	0.3.0	PYSEC-2024-163

Affected products (as reported)

Vendor	Product	Versions
vyperlang	vyper	< 0.3.0

Weakness: CWE-667 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

https://github.com/vyperlang/vyper/security/advisories/GHSA-m2v9-w374-5hj9 x_refsource_CONFIRM
https://github.com/vyperlang/vyper/issues/2455 x_refsource_MISC
https://github.com/vyperlang/vyper/commit/93287e5ac184b53b395c907d40701f721daf8177 x_refsource_MISC