Vulnerability Description
Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, during codegen, the length word of a dynarray is written before the data, which can result in out-of-bounds array access in the case where the dynarray is on both the lhs and rhs of an assignment. The issue can cause data corruption across call frames. The expected behavior is to revert due to out-of-bounds array access. Version 0.3.8 contains a patch for this issue.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vyperlang | Vyper | < 0.3.8 |
Related Weaknesses (CWE)
References
- https://github.com/vyperlang/vyper/commit/4f8289a81206f767df1900ac48f485d90fc87ePatch
- https://github.com/vyperlang/vyper/security/advisories/GHSA-3p37-3636-q8wvExploitVendor Advisory
- https://github.com/vyperlang/vyper/commit/4f8289a81206f767df1900ac48f485d90fc87ePatch
- https://github.com/vyperlang/vyper/security/advisories/GHSA-3p37-3636-q8wvExploitVendor Advisory
FAQ
What is CVE-2023-31146?
CVE-2023-31146 is a vulnerability with a CVSS score of 7.5 (HIGH). Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, during codegen, the length word of a dynarray is written before the data, which can result in out-...
How severe is CVE-2023-31146?
CVE-2023-31146 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-31146?
Check the references section above for vendor advisories and patch information. Affected products include: Vyperlang Vyper.