CVE-2023-34449

CVSS 3.1 Score 5.3 of 10 (medium)

Details

Published Jun 14, 2023
Updated: Jun 28, 2023
CWE ID 754
CWE ID 253

Summary

CVE-2023-34449 affects versions 4.0.0 to 4.2.0 of ink!, an embedded domain-specific language used to write smart contracts in Rust for Substrate-based blockchains. The vulnerability stems from incorrect decoding of return values when using delegate call mechanics, specifically through `CallBuilder::delegate` or `ink_env::invoke_contract_delegate`. This issue originated from a change in how a call's return buffer is decoded, introduced in pull request 1450. Since ink! version 4.0.0 is the first to include this feature, only users with ink! 4.x contracts need to upgrade to version 4.2.1 to apply the patch.

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