Headline
CVE-2022-39354: Allow is_static to be passed to precompiles by sorpaas · Pull Request #133 · rust-blockchain/evm
SputnikVM, also called evm, is a Rust implementation of Ethereum Virtual Machine. A custom stateful precompile can use the is_static parameter to determine if the call is executed in a static context (via STATICCALL), and thus decide if stateful operations should be done. Prior to version 0.36.0, the passed is_static parameter was incorrect – it was only set to true if the call came from a direct STATICCALL opcode. However, once a static call context is entered, it should stay static. The issue only impacts custom precompiles that actually uses is_static. For those affected, the issue can lead to possible incorrect state transitions. Version 0.36.0 contains a patch. There are no known workarounds.
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### Impact A custom stateful precompile can use the `is_static` parameter to determine if the call is executed in a static context (via `STATICCALL`), and thus decide if stateful operations should be done. Previously, the passed `is_static` parameter was incorrect -- it was only set to `true` if the call comes from a **direct** `STATICCALL` opcode. However, once a static call context is entered, it should stay static. The issue only impacts custom precompiles that actually uses `is_static`. The maintainers estimate the usage is low. However, for those affected, it can lead to possible incorrect state transitions. ### Patches PR: https://github.com/rust-blockchain/evm/pull/133 Released in v0.36.0. Older patch versions can be released on request if anyone needs them. Simply contact @sorpaas by email to request it. ### For more information If you have any questions or comments about this advisory: * Open an issue in [evm repo](https://github.com/rust-blockchain/evm) * Email Wei at...