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Authentication bypass by capture-replay in github.com/cosmos/ethermint

High severity GitHub Reviewed Published Feb 15, 2022 to the GitHub Advisory Database • Updated Oct 2, 2023

Package

gomod github.com/cosmos/ethermint (Go)

Affected versions

< 0.4.1

Patched versions

0.4.1

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.

Specific Go Packages Affected

github.com/cosmos/ethermint/rpc/namespaces/eth

References

Reviewed May 12, 2021
Published to the GitHub Advisory Database Feb 15, 2022
Last updated Oct 2, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

0.071%
(33rd percentile)

Weaknesses

CVE ID

CVE-2021-25835

GHSA ID

GHSA-x5f3-qmwj-4f84

Source code

No known source code
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