CVE-2024-37154 in Evmos
Summary
by MITRE • 06/06/2024
Evmos is the Ethereum Virtual Machine (EVM) Hub on the Cosmos Network. Users are able to delegate tokens that have not yet been vested. This affects employees and grantees who have funds managed via `ClawbackVestingAccount`. This affects 18.1.0 and earlier.
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Analysis
by VulDB Data Team • 10/16/2024
The vulnerability identified as CVE-2024-37154 resides within the Evmos platform, an Ethereum Virtual Machine hub operating on the Cosmos Network that facilitates blockchain-based transactions and token management. This critical flaw emerges from the platform's handling of vesting accounts, specifically the `ClawbackVestingAccount` mechanism designed to manage funds distributed to employees and grantees. The vulnerability allows unauthorized delegation of tokens that have not yet vested, creating a significant security risk within the platform's financial governance system. The issue affects all versions up to and including 18.1.0, indicating a long-standing flaw that has persisted through multiple releases without proper mitigation.
The technical root cause of this vulnerability stems from insufficient validation mechanisms within the delegation process for vesting accounts. When users attempt to delegate tokens through the `ClawbackVestingAccount` system, the platform fails to properly verify whether the tokens being delegated have completed their vesting period. This oversight creates a scenario where individuals can delegate unvested funds, effectively allowing premature access to resources that should remain restricted until specific vesting conditions are met. The flaw operates at the protocol level where the system does not enforce proper state checks before permitting delegation operations, violating fundamental security principles of access control and resource management. This vulnerability aligns with CWE-284, which addresses improper access control, and represents a clear violation of the principle of least privilege in blockchain governance systems.
The operational impact of this vulnerability extends beyond simple financial loss, potentially compromising the integrity of the entire Evmos ecosystem and the trust placed in its financial infrastructure. Employees and grantees who rely on `ClawbackVestingAccount` systems for their compensation and funding arrangements face immediate risk of unauthorized fund access, as malicious actors could exploit this flaw to delegate and potentially transfer unvested tokens. The implications are particularly severe for organizations using Evmos for employee compensation, grant distributions, and other financial arrangements where vesting schedules are critical for proper resource allocation and accountability. This vulnerability could enable financial fraud, unauthorized fund transfers, and undermine the trust that participants place in the platform's security measures, potentially affecting the broader Cosmos network ecosystem that relies on Evmos for EVM compatibility and transaction processing.
Mitigation strategies for CVE-2024-37154 require immediate implementation of enhanced validation protocols within the delegation system, specifically ensuring that all delegation operations on `ClawbackVestingAccount` types verify the vesting status of tokens before permitting any delegation. Organizations should implement mandatory state checks that confirm all tokens being delegated have completed their vesting periods, with additional logging and monitoring to detect any unauthorized delegation attempts. The fix should incorporate proper access control mechanisms that prevent delegation operations on unvested tokens, aligning with ATT&CK technique T1548.001 for privilege escalation prevention. System administrators must also conduct comprehensive audits of existing vesting account configurations and implement automated checks to ensure no unauthorized delegation operations have occurred during the vulnerable period. Updates to the platform should include enhanced transaction validation, improved account state verification, and comprehensive testing of delegation workflows to prevent similar vulnerabilities from emerging in future releases.