Cryptoisthekey

**Name of the Vulnerable Software and Affected Versions** Go Ethereum (aka geth) versions 1.10.21 and earlier **Description** The issue allows attackers to increase rewards by mining blocks in certain situations, and using a manipulation of time-difference values to achieve replacement of main-chain blocks, also known as Riskless Uncle Making (RUM). This issue has been exploited in the wild. **Recommendations** For Go Ethereum (aka geth) versions 1.10.21 and earlier, update to a version later than 1.10.21 to resolve the issue. As a temporary workaround, consider restricting the ability to manipulate time-difference values to minimize the risk of exploitation.