CVE-2024-37153 Evmos's contract balance not updating correctly after interchain transaction

2024-06-0618:51:30

CWE-670

GitHub_M

github.com

cve-2024-37153

evmos

evm hub

cosmos network

liquid stake

safe contract

local state change

ics20 transfer

contract balance

infinite money glitch

supply doubling

patch

v18.1.0

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

6.5 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

9.1%

JSON

Evmos is the Ethereum Virtual Machine (EVM) Hub on the Cosmos Network. There is an issue with how to liquid stake using Safe which itself is a contract. The bug only appears when there is a local state change together with an ICS20 transfer in the same function and uses the contract’s balance, that is using the contract address as the sender parameter in an ICS20 transfer using the ICS20 precompile. This is in essence the “infinite money glitch” allowing contracts to double the supply of Evmos after each transaction.The issue has been patched in versions >=V18.1.0.

CNA Affected

[
  {
    "vendor": "evmos",
    "product": "evmos",
    "versions": [
      {
        "version": "<= 18.0.0",
        "status": "affected"
      }
    ]
  }
]