Vulnerability · Published Feb 8, 2021 · Assigned by mitre

CVE-2021-25835

High 7.5

In plain English

A high-severity security flaw in the github.com/cosmos/ethermint package (Go). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High

Exploit odds (30 days)1.3%top 28.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/cosmos/ethermint	0.4.1	GHSA-x5f3-qmwj-4f84
Go	github.com/cosmos/ethermint	0.4.1	GO-2022-0889

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/cosmos/ethermint/issues/687 x_refsource_MISC
https://github.com/cosmos/ethermint/pull/692 x_refsource_MISC