CVE-2021-48019
Description
A flaw was found in Vyper. Forwarder proxies created using the built-in create_forwarder_to function report a fixed return data size instead of the actual data length returned by the target contract. A remote caller or interacting smart contract can encounter data corruption when returned payloads exceed the fixed limit without proper sanitization. Additionally, external callers that strictly validate return data length may fail assertions, leading to unexpected transaction reverts and Denial of Service (DoS).
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)
Confidentiality,Integrity
Technical Impact: Read Memory; Modify Memory; Varies by Context
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