CVE-2023-34449 Information

Description

ink! is an embedded domain specific language to write smart contracts in Rust for blockchains built on the Substrate framework. Starting in version 4.0.0 and prior to version 4.2.1 the return value when using delegate call mechanics either through CallBuilder::delegate or ink_env::invoke_contract_delegate is decoded incorrectly. This bug was related to the mechanics around decoding a call’s return buffer which was changed as part of pull request 1450. Since this feature was only released in ink! 4.0.0 no previous versions are affected. Users who have an ink! 4.x series contract should upgrade to 4.2.1 to receive a patch.

Reference

https://github.com/paritytech/ink/pull/1450 https://github.com/paritytech/ink/commit/f1407ee9f87e5f64d467a22d26ee88f61db7f3db https://docs.rs/ink_env/4.2.0/ink_env/fn.invoke_contract_delegate.html https://github.com/paritytech/ink/security/advisories/GHSA-853p-5678-hv8f https://docs.rs/ink_env/4.2.0/ink_env/call/struct.CallBuilder.html#method.delegate