Aaronc

**Name of the Vulnerable Software and Affected Versions** Cosmos-SDK versions 0.43.x through 0.44.1 **Description** The Cosmos-SDK is a framework for building blockchain applications in Golang. Affected versions of the SDK were vulnerable to a consensus halt due to non-deterministic behaviour in a `ValidateBasic` method in the `x/authz` module. The `MsgGrant` of the `x/authz` module contains a `Grant` field which includes a user-defined expiration time for when the authorization grant expires. In `Grant.ValidateBasic()`, that time is compared to the node’s local clock time. Any chain running an affected version of the SDK with the `authz` module enabled could be halted by anyone with the ability to send transactions on that chain. Recovery would require applying the patch and rolling back the latest block. Funds and balances are safe. **Recommendations** Update to version 0.44.2 to resolve the issue. As a temporary workaround, consider manually patching the code until the official update can be applied.