Vulnerabilities > CVE-2021-43839 - Always-Incorrect Control Flow Implementation vulnerability in Crypto Cronos, Ethermint and Evmos
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
HIGH Availability impact
NONE Summary
Cronos is a commercial implementation of a blockchain. In Cronos nodes running versions before v0.6.5, it is possible to take transaction fees from Cosmos SDK's FeeCollector for the current block by sending a custom crafted MsgEthereumTx. This problem has been patched in Cronos v0.6.5. There are no tested workarounds. All validator node operators are recommended to upgrade to Cronos v0.6.5 at their earliest possible convenience.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 13 |