Evmos is a scalable, high-throughput Proof-of-Stake EVM blockchain that is fully compatible and interoperable with Ethereum. Prior to 17.0.0, there is a way to mint arbitrary tokens due to the possibility to have two different states not in sync during the execution of a transaction. The exploit is based on the fact that to sync the Cosmos SDK state and the EVM one, we rely on the `stateDB.Commit()` method. When we call this method, we iterate though all the `dirtyStorage` and, **if and only if** it is different than the `originStorage`, we set the new state. Setting the new state means we update the Cosmos SDK KVStore. If a contract storage state that is the same before and after a transaction, but is changed during the transaction and can call an external contract after the change, it can be exploited to make the transaction similar to non-atomic. The vulnerability is **critical** since this could lead to drain of funds through creative SC interactions. The issue has been patched in versions >=V17.0.0.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| github.com/evmos/evmos/v16(Go) | 0 | 17.0.0 | N/A |
| github.com/evmos/evmos/v7(Go) | 0 | N/A | N/A |
| github.com/evmos/evmos/v6(Go) | 0 | N/A | N/A |
| github.com/evmos/evmos/v5(Go) | 0 | N/A | N/A |
| github.com/tharsis/evmos(Go) | 0 | N/A | N/A |
| github.com/tharsis/evmos/v2(Go) | 0 | N/A | N/A |
| github.com/tharsis/evmos/v3(Go) | 0 | N/A | N/A |
| github.com/tharsis/evmos/v4(Go) | 0 | N/A | N/A |
| github.com/tharsis/evmos/v5(Go) | 0 | N/A | N/A |
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