CVE-2021-39193 : Security Advisory and Response

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 due to not validating the input data size. Discover more about this CVE below.

Understanding CVE-2021-39193

This section delves into the specifics of the vulnerability and its impact.

What is CVE-2021-39193?

The vulnerability in pallet-ethereum before commit 0b962f218f0cdd796dadfe 26c3f09e68f7861b26 allows invalid transactions to enter Ethereum's block state. Learn more about the issue.

The Impact of CVE-2021-39193

The impact is rated as MEDIUM with a CVSS base score of 5.3. Find out more about the effects of this vulnerability.

Technical Details of CVE-2021-39193

In this section, we delve into the technical aspects of the CVE.

Vulnerability Description

The bug in

pallet-ethereum

allows invalid transactions to be included in the Ethereum block state without proper validation. Discover more about this oversight.

Affected Systems and Versions

Affected Product: Frontier
Vendor: Paritytech
Vulnerable Version: < 0b962f218f0cdd796dadfe26c3f09e68f7861b26

Exploitation Mechanism

No information provided.

Mitigation and Prevention

Learn how to mitigate the vulnerability and prevent exploitation.

Immediate Steps to Take

Apply the patch available in commit 0b962f218f0cdd796dadfe26c3f09e68f7861b26.

Long-Term Security Practices

Regularly update the software to the latest version.
Stay informed about security advisories for Substrate and related projects.

Patching and Updates

Ensure to update to a patched version to protect systems from this vulnerability.