CVE-2021-25835

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.18%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/cosmos/ethermint/issues/687 third party advisory
https://github.com/cosmos/ethermint/pull/692 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-25835?
CVE-2021-25835 has been scored as a high severity vulnerability.
How to fix CVE-2021-25835?
To fix CVE-2021-25835, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-25835 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-25835 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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