# CVE-2021-43839: Drainage of FeeCollector's Block Transaction Fees in cronos

Source: https://junglewise.ai/threats/cve-2021-43839-drainage-of-feecollector-s-block-transaction-fees-in-cronos  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-01-06  
License: CC BY 4.0 with a link back

CVE-2021-43839 · Severity: low · CVSS 3.1 · Published 2022-01-06

Drainage of FeeCollector's Block Transaction Fees in cronos

Technologies: [github.com/crypto-org-chain/cronos (Go)](https://junglewise.ai/threats/technologies/github-com-crypto-org-chain-cronos), [github.com/tharsis/evmos (Go)](https://junglewise.ai/threats/technologies/github-com-tharsis-evmos). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2021-43839 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-43839 being exploited in the wild.

**How severe is CVE-2021-43839?** Low severity, with a CVSS score of 3.1, published 6 January 2022.

**Which products and versions are affected?** github.com/crypto-org-chain/cronos (Go) SEMVER:introduced=0,fixed=0.6.5; github.com/tharsis/ethermint (Go) SEMVER:introduced=0.8.0,fixed=0.10.0; github.com/tharsis/evmos (Go) SEMVER:introduced=0,last_affected=0.4.2.

**Is there a fix for CVE-2021-43839?** Yes. github.com/crypto-org-chain/cronos (Go): upgrade to 0.6.5 or later; github.com/tharsis/ethermint (Go): upgrade to 0.10.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-43839?** Check whether you run github.com/crypto-org-chain/cronos (Go), github.com/tharsis/ethermint (Go) or github.com/tharsis/evmos (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/crypto-org-chain/cronos (Go): upgrade to 0.6.5 or later

  ```sh
  go get github.com/crypto-org-chain/cronos@v0.6.5
  ```

- github.com/tharsis/ethermint (Go): upgrade to 0.10.0 or later

  ```sh
  go get github.com/tharsis/ethermint@v0.10.0
  ```


## Affected products

- github.com/crypto-org-chain/cronos (Go) SEMVER:introduced=0,fixed=0.6.5
- github.com/tharsis/ethermint (Go) SEMVER:introduced=0.8.0,fixed=0.10.0
- github.com/tharsis/evmos (Go) SEMVER:introduced=0,last_affected=0.4.2

## Identifiers

- CVE-2021-43839
- GHSA-f854-hpxv-cw9r

## Related threats

- [GO-2022-0829 - Cronos vulnerable to DoS through unintended Contract Selfdestruct in github.com/crypto-org-chain/cronos](https://junglewise.ai/threats/go-2022-0829-cronos-vulnerable-to-dos-through-unintended-contract-9113d12c)
- [GO-2022-0760 - Ethermint vulnerable to DoS through unintended Contract Selfdestruct in github.com/crypto-org-chain/cronos](https://junglewise.ai/threats/cve-2022-35936-ethermint-vulnerable-to-dos-through-unintended-contract)
- [GO-2022-0348 - Account compromise in Evmos in github.com/tharsis/evmos](https://junglewise.ai/threats/cve-2022-24738-account-compromise-in-evmos)
- [Evmos transaction execution not accounting for all state transition after interaction with precompiles](https://junglewise.ai/threats/cve-2024-32644-evmos-transaction-execution-not-accounting-for-all-state)
- [Cronos vulnerable to DoS through unintended Contract Selfdestruct](https://junglewise.ai/threats/cronos-vulnerable-to-dos-through-unintended-contract-selfdestruct-524e82e8)