CVE-2020-37289
Description
A flaw was found in Vyper. The compiler does not validate the upper bounds of smaller integer types returned from external contract interfaces, allowing 8-bit values to be stored in larger 256-bit variables without range verification. A malicious smart contract can exploit this flaw by returning out-of-range integer values, enabling an attacker to bypass business logic or manipulate calculations within contracts that rely on those values.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
When input does not comply with the expected type, attackers could trigger unexpected errors, cause incorrect actions to take place, or exploit latent vulnerabilities that would not be possible if the input conformed with the expected type.
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