{"id":"GHSA-f854-hpxv-cw9r","summary":"Drainage of FeeCollector's Block Transaction Fees in cronos","details":"### Impact\nIn 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.\n\nUser funds and balances are safe.\n\n\n### Patches\nThis problem has been patched in Cronos v0.6.5 on the mempool level.\nThe next network upgrade with consensus-breaking changes will patch it on the consensus level.\n\n### Workarounds\nThere are no tested workarounds. All validator node operators are recommended to upgrade to Cronos v0.6.5 at their earliest possible convenience.\n\n### Credits\nThank you to @zb3 for reporting this issue on [Cronos Immunefi Bug Bounty Program](https://immunefi.com/bounty/cronos/), to @cyril-crypto for reproducing the issue and to @yihuang and @thomas-nguy for patching the issue on the CheckTx (mempool) and the DeliverTx (consensus) levels.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open a discussion in [crypto-org-chain/cronos](https://github.com/crypto-org-chain/cronos/discussions/new)\n* Email us at [chain@crypto.org](mailto:chain@crypto.org)\n","aliases":["CVE-2021-43839"],"modified":"2026-07-08T06:29:14.059124576Z","published":"2022-01-06T18:30:54Z","database_specific":{"nvd_published_at":"2021-12-21T17:15:00Z","cwe_ids":["CWE-670"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2022-01-04T22:40:01Z"},"references":[{"type":"WEB","url":"https://github.com/crypto-org-chain/cronos/security/advisories/GHSA-f854-hpxv-cw9r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43839"},{"type":"WEB","url":"https://github.com/crypto-org-chain/cronos/pull/270"},{"type":"WEB","url":"https://github.com/crypto-org-chain/cronos/commit/150ef237b37ac28c8136e1c0f494932860b9ebe8"},{"type":"WEB","url":"https://github.com/crypto-org-chain/cronos"}],"affected":[{"package":{"name":"github.com/crypto-org-chain/cronos","ecosystem":"Go","purl":"pkg:golang/github.com/crypto-org-chain/cronos"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.6.5"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/01/GHSA-f854-hpxv-cw9r/GHSA-f854-hpxv-cw9r.json"}},{"package":{"name":"github.com/tharsis/ethermint","ecosystem":"Go","purl":"pkg:golang/github.com/tharsis/ethermint"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.8.0"},{"fixed":"0.10.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/01/GHSA-f854-hpxv-cw9r/GHSA-f854-hpxv-cw9r.json"}},{"package":{"name":"github.com/tharsis/evmos","ecosystem":"Go","purl":"pkg:golang/github.com/tharsis/evmos"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.4.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/01/GHSA-f854-hpxv-cw9r/GHSA-f854-hpxv-cw9r.json"}},{"package":{"name":"github.com/tharsis/ethermint","ecosystem":"Go","purl":"pkg:golang/github.com/tharsis/ethermint"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.7.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/01/GHSA-f854-hpxv-cw9r/GHSA-f854-hpxv-cw9r.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}