Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-39193

5.3 · MEDIUM

Frontier is Substrate's Ethereum compatibility layer.

Published Sep 3, 2021CWE-20EPSS 1.19%

Overview

CVE-2021-39193 is a medium-severity vulnerability. It was published on September 3, 2021 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Frontier is Substrate's Ethereum compatibility layer. Prior to commit number 0b962f218f0cdd796dadfe26c3f09e68f7861b26, a bug in `pallet-ethereum` can cause invalid transactions to be included in the Ethereum block state in `pallet-ethereum` due to not validating the input data size. Any invalid transactions included this way have no possibility to alter the internal Ethereum or Substrate state. The transaction will appear to have be included, but is of no effect as it is rejected by the EVM engine. The impact is further limited by Substrate extrinsic size constraints. A patch is available in commit number 0b962f218f0cdd796dadfe26c3f09e68f7861b26. There are no workarounds aside from applying the patch.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/paritytech/frontier/commit/0b962f218f0cdd796dadfe26c3f09e68f7861b26GitHubgithub.com/paritytech/frontier/pull/465GitHubgithub.com/paritytech/frontier/pull/465/commits/8a2b890a2fb477d5fedd0e4335b00623832849aeGitHubgithub.com/paritytech/frontier/security/advisories/GHSA-hw4v-5x4h-c3xmGitHubgithub.com/paritytech/frontier/commit/0b962f218f0cdd796dadfe26c3f09e68f7861b26GitHubgithub.com/paritytech/frontier/pull/465GitHubgithub.com/paritytech/frontier/pull/465/commits/8a2b890a2fb477d5fedd0e4335b00623832849aeGitHubgithub.com/paritytech/frontier/security/advisories/GHSA-hw4v-5x4h-c3xm

How CyberStrike helps

Frequently asked questions

What is CVE-2021-39193?

CVE-2021-39193 is a medium-severity vulnerability. It was published on September 3, 2021 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2021-39193?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-39193?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-39193?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-39193 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999