CVE-2021-48018
Description
A flaw was found in Vyper. The compiler improperly assigns storage locations for reentrancy locks—safeguards designed to prevent repeated, recursive execution—to the same memory slots as contract variables. When an external caller invokes a protected function, setting the lock overwrites existing contract data, resulting in storage corruption and disruption of the contract's intended logic.
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
If the product assumes that each resource has a unique identifier, the product could operate on the wrong resource if attackers can cause multiple resources to be associated with the same identifier.
Access Control
Technical Impact: Bypass Protection Mechanism
If unique identifiers are assumed when protecting sensitive resources, then duplicate identifiers might allow attackers to bypass the protection.
Other
Technical Impact: Quality Degradation
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