CVE-2024-39696: evmos Auth Bypass — Fix

Description

Evmos is a decentralized Ethereum Virtual Machine chain on the Cosmos Network. Prior to version 19.0.0, a user can create a vesting account with a 3rd party account (EOA or contract) as funder. Then, this user can create an authorization for the contract.CallerAddress, this is the authorization checked in the code. But the funds are taken from the funder address provided in the message. Consequently, the user can fund a vesting account with a 3rd party account without its permission. The funder address can be any address, so this vulnerability can be used to drain all the accounts in the chain. The issue has been patched in version 19.0.0.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-863 Incorrect Authorization

Affected Products

Vendor	Product	Versions
evmos	evmos	< 19.0.0

References

Advisories & Patches

https://github.com/evmos/evmos/commit/0a620e176617a835ac697eea494afea09185dfaf https://github.com/evmos/evmos/security/advisories/GHSA-q6hg-6m9x-5g9c https://github.com/evmos/evmos/commit/0a620e176617a835ac697eea494afea09185dfaf https://github.com/evmos/evmos/security/advisories/GHSA-q6hg-6m9x-5g9c

Frequently Asked Questions

What is CVE-2024-39696? +

Evmos is a decentralized Ethereum Virtual Machine chain on the Cosmos Network. Prior to version 19.0.0, a user can create a vesting account with a 3rd party account (EOA or contract) as funder. Then, this user can create an authorization for the contract.CallerAddress, this is the authorization checked in the code. But the funds are taken from the funder address provided in the message. Consequently, the user can fund a vesting account with a 3rd party account without its permission. The funder address can be any address, so this vulnerability can be used to drain all the accounts in the chain. The issue has been patched in version 19.0.0. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2024-39696? +

CVE-2024-39696 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-39696? +

CVE-2024-39696 affects products from evmos, specifically: evmos. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-39696? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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