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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2020-37289

Vyper before 0.3.1 Improper Input Validation of uint8 Interface Return Values

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

Vyper before 0.3.1 lacks a uint8 type, allowing interface return values declared as uint8, such as ERC20.decimals(), to be stored in uint256 variables without bounds checking. Malicious contracts can return values greater than 255 to manipulate or bypass contract logic that relies on these values.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

vyperlang vyper

Default version status: unaffected

  • 0 to < 0.3.1affected
  • 0.3.1unaffected
pkg:pypi/vyper

References