Vulnerability in Chainsafe Ethermint
CVE-2021-25835
Cosmos Network Ethermint <= v0.4.0 is affected by a cross-chain transaction replay vulnerability in the EVM module. Since ethermint uses the same chainIDEpoch and signature schemes with ethereum for compatibility, a verified signature in ethereum is still valid in ethermint with the same msg content and chainIDEpoch, which enables "cross-chain transaction replay" attack.
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 (70.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.4% 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
Weakness classification (CWE)
References
- github.com/cosmos/ethermint/issues/687 (Third Party Advisory)
- github.com/cosmos/ethermint/pull/692 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-25835?
- CVE-2021-25835 is a high-severity vulnerability in Chainsafe Ethermint, classified under Authentication Bypass by Capture-replay. CVSS score: 7.5/10. Published 2021-02-08.
- How severe is CVE-2021-25835?
- High severity. CVSS v3 base score is 7.5 out of 10.