CVE-2021-43839

HIGH
Published Dec 21, 20214y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Dec 21, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

Description

Cronos is a commercial implementation of a blockchain. In Cronos nodes running versions before v0.6.5, it is possible to take transaction fees from Cosmos SDK's FeeCollector for the current block by sending a custom crafted MsgEthereumTx. This problem has been patched in Cronos v0.6.5. There are no tested workarounds. All validator node operators are recommended to upgrade to Cronos v0.6.5 at their earliest possible convenience.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-670

Affected Products 4

VendorProductVersionRange
cryptocronos* <0.6.5
cryptoethermint* <0.7.3
cryptoethermint*≥0.8.0  –  ≤0.9.0
cryptoevmos* ≤0.4.2

References 3

  • github.com https://github.com/crypto-org-chain/cronos/commit/150ef237b37ac28c8136e1c0f494932860b9ebe8
    PatchThird Party Advisory
  • github.com https://github.com/crypto-org-chain/cronos/pull/270
    PatchThird Party Advisory
  • github.com https://github.com/crypto-org-chain/cronos/security/advisories/GHSA-f854-hpxv-cw9r
    Third Party Advisory

Remediation

  • github.com https://github.com/crypto-org-chain/cronos/commit/150ef237b37ac28c8136e1c0f494932860b9ebe8
    PatchThird Party Advisory
  • github.com https://github.com/crypto-org-chain/cronos/pull/270
    PatchThird Party Advisory