Vulnerability in Crypto Cronos
CVE-2021-43839
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.013 (69.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Crypto Cronos
- Crypto Ethermint
- Crypto Evmos
- Crypto-Org-Chain Cronos — versions < 0.6.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/crypto-org-chain/cronos/security/advisories/GHSA-f854-hpxv-cw9r (Third Party Advisory)
- github.com/crypto-org-chain/cronos/pull/270 (Patch, Third Party Advisory)
- github.com/crypto-org-chain/cronos/commit/150ef237b37ac28c8136e1c0f494932860b9e… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-43839?
- CVE-2021-43839 is a high-severity vulnerability in Crypto Cronos, classified under Always-Incorrect Control Flow Implementation. CVSS score: 7.5/10. Published 2021-12-21.
- How severe is CVE-2021-43839?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-43839 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.