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.

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.

EPSS: 0.013 (67.2th percentile) — read the EPSS interpretation.

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.

Affected products

Chainsafe Ethermint
N/a — versions n/a

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)

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.