CVE-2021-41138

Published on: 10/13/2021 12:00:00 AM UTC

Last Modified on: 10/20/2021 04:45:00 PM UTC

CVE-2021-41138 - advisory for GHSA-vj62-g63v-f8mf

Source: Mitre Source: Nist Print: PDF PDF
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Certain versions of Frontier from Parity contain the following vulnerability:

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`.

  • CVE-2021-41138 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • Affected Vendor/Software: URL Logo paritytech - frontier version < 146bb48

CVSS3 Score: 5.3 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW NONE NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED NONE LOW NONE

CVSS2 Score: 5 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK LOW NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
NONE PARTIAL NONE

CVE References

Description Tags Link
Validity check for signed Frontier-specific extrinsic not called in block execution · Advisory · paritytech/frontier · GitHub github.com
text/html
URL Logo CONFIRM github.com/paritytech/frontier/security/advisories/GHSA-vj62-g63v-f8mf
Ensure no error is possible in `apply_validated_transaction` and fix `correct_and_deposit_fee` by sorpaas · Pull Request #497 · paritytech/frontier · GitHub github.com
text/html
URL Logo MISC github.com/paritytech/frontier/pull/497
Fix security issue: transaction validity controls must be executed in… · paritytech/[email protected] · GitHub github.com
text/html
URL Logo MISC github.com/paritytech/frontier/commit/146bb48849e5393004be5c88beefe76fdf009aba

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationParityFrontierAllAllAllAll
  • cpe:2.3:a:parity:frontier:*:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-41138 : Frontier is Substrate's Ethereum compatibility layer. In the newly introduced signed Frontier-spec… twitter.com/i/web/status/1… 2021-10-13 15:20:30
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