Integer overflow in Vyperlang Vyper
CVE-2023-32058
Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, due to missing overflow check for loop variables, by assigning the iterator of a loop to a variable, it is possible to overflow the type of the latter. The issue seems to happen only in loops of type `for i in range(a, a + N)` as in loops of type `for i in range(start, stop)` and `for i in range(stop)`, the compiler is able to raise a `TypeMismatch` when trying to overflow the variable. The problem has been patched in version 0.3.8.
Vulnerability class: Integer Overflow
EPSS: 0.009 (57.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Vyperlang Vyper — versions < 0.3.8
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2023-32058?
- CVE-2023-32058 is a high-severity vulnerability in Vyperlang Vyper, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2023-05-11.
- How severe is CVE-2023-32058?
- High severity. CVSS v3 base score is 7.5 out of 10.