CVE-2021-25835 : What You Need to Know
Learn about CVE-2021-25835 impacting Cosmos Network Ethermint <= v0.4.0 due to a cross-chain transaction replay vulnerability, allowing unauthorized transactions. Find mitigation steps and preventive measures here.
Cosmos Network Ethermint <= v0.4.0 is affected by a cross-chain transaction replay vulnerability in the EVM module, allowing for a "cross-chain transaction replay" attack.
Understanding CVE-2021-25835
This vulnerability impacts Cosmos Network Ethermint versions up to v0.4.0.
What is CVE-2021-25835?
CVE-2021-25835 is a security flaw in Ethermint that stems from its compatibility with Ethereum, which enables a verified signature in Ethereum to be valid in Ethermint, leading to potential cross-chain transaction replay attacks.
The Impact of CVE-2021-25835
The vulnerability could be exploited by attackers to perform unauthorized transactions across different chains, compromising the integrity and security of the affected systems.
Technical Details of CVE-2021-25835
Ethermint version <= v0.4.0 is susceptible to a cross-chain transaction replay vulnerability due to shared signature schemes with Ethereum.
Vulnerability Description
Ethermint's use of the same chainIDEpoch and signature schemes as Ethereum allows for the validation of Ethereum signatures in Ethermint, leading to cross-chain transaction replay attacks.
Affected Systems and Versions
Cosmos Network Ethermint versions up to v0.4.0 are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this flaw by leveraging the compatibility between Ethermint and Ethereum to execute unauthorized cross-chain transactions.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-25835, immediate actions and long-term security practices must be implemented.
Immediate Steps to Take
Developers and users of Ethermint should update to the latest version to patch the vulnerability and prevent potential attacks.
Long-Term Security Practices
Regularly update Ethermint to the latest releases, follow secure coding practices, and monitor for any unusual cross-chain transactions.
Patching and Updates
Stay informed about security updates provided by Ethermint developers and promptly apply patches to eliminate the vulnerability.