CVE Vulnerability

CVE-2021-41138

Frontier is Substrate's Ethereum compatibility layer. In the newly introduced signed Frontier-specific extrinsic for `pallet-ethereum`, a large part of transaction validation logic was only called in transaction pool validation, but not in block execution. Malicious validators can take advantage of this to put invalid transactions into a block. The attack is limited in that the signature is always validated, and the majority of the validation is done again in the subsequent `pallet-evm` execution logic. However, do note that a chain ID replay attack was possible. In addition, spamming attacks are of main concerns, while they are limited by Substrate block size limits and other factors. The issue is patched in commit `146bb48849e5393004be5c88beefe76fdf009aba`.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

5.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/paritytech/frontier/commit/146bb48849e5393004be5c88beefe76fdf009aba Patch Third Party Advisory
https://github.com/paritytech/frontier/pull/497 Patch Third Party Advisory
https://github.com/paritytech/frontier/security/advisories/GHSA-vj62-g63v-f8mf Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:parity:frontier:*:*:*:*:*:*:*:*
Information

Published : 2021-10-13 04:15

Updated : 2021-10-20 04:45

NVD link : CVE-2021-41138

Mitre link : CVE-2021-41138

Products Affected
No products.
CWE
CWE-20