CVE-2023-32059

Public Exploit
Vyper vulnerable to incorrect ordering of arguments for kwargs passed to internal calls

Description

Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, internal calls with default arguments are compiled incorrectly. Depending on the number of arguments provided in the call, the defaults are added not right-to-left, but left-to-right. If the types are incompatible, typechecking is bypassed. The ability to pass kwargs to internal functions is an undocumented feature that is not well known about. The issue is patched in version 0.3.8.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.06%
Vendor Advisory github.com
Affected: vyperlang vyper
Published at:
Updated at:

References

Link Tags
https://github.com/vyperlang/vyper/security/advisories/GHSA-ph9x-4vc9-m39g exploit vendor advisory
https://github.com/vyperlang/vyper/commit/c3e68c302aa6e1429946473769dd1232145822ac patch

Frequently Asked Questions

What is the severity of CVE-2023-32059?
CVE-2023-32059 has been scored as a high severity vulnerability.
How to fix CVE-2023-32059?
To fix CVE-2023-32059, 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-2023-32059 being actively exploited in the wild?
It is possible that CVE-2023-32059 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-2023-32059?
CVE-2023-32059 affects vyperlang vyper.
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