Vulnerability Description
Vyper is a Pythonic Smart Contract Language. For the following (probably non-exhaustive) list of expressions, the compiler evaluates the arguments from right to left instead of left to right. `unsafe_add, unsafe_sub, unsafe_mul, unsafe_div, pow_mod256, |, &, ^ (bitwise operators), bitwise_or (deprecated), bitwise_and (deprecated), bitwise_xor (deprecated), raw_call, <, >, <=, >=, ==, !=, in, not in (when lhs and rhs are enums)`. This behaviour becomes a problem when the evaluation of one of the arguments produces side effects that other arguments depend on. The following expressions can produce side-effect: state modifying external call , state modifying internal call, `raw_call`, `pop()` when used on a Dynamic Array stored in the storage, `create_minimal_proxy_to`, `create_copy_of`, `create_from_blueprint`. This issue has not yet been patched. Users are advised to make sure that the arguments of the expression do not produce side effects or, if one does, that no other argument is dependent on those side effects.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vyperlang | Vyper | <= 0.3.9 |
Related Weaknesses (CWE)
References
- https://github.com/vyperlang/vyper/security/advisories/GHSA-g2xh-c426-v8mfExploitThird Party Advisory
- https://github.com/vyperlang/vyper/security/advisories/GHSA-g2xh-c426-v8mfExploitThird Party Advisory
FAQ
What is CVE-2023-40015?
CVE-2023-40015 is a vulnerability with a CVSS score of 3.7 (LOW). Vyper is a Pythonic Smart Contract Language. For the following (probably non-exhaustive) list of expressions, the compiler evaluates the arguments from right to left instead of left to right. `unsafe_...
How severe is CVE-2023-40015?
CVE-2023-40015 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-40015?
Check the references section above for vendor advisories and patch information. Affected products include: Vyperlang Vyper.