CVE-2022-1930 : What You Need to Know

An exponential ReDoS (Regular Expression Denial of Service) vulnerability has been identified in the eth-account PyPI package. This vulnerability can be exploited by an attacker to trigger a denial of service when arbitrary input is provided to the encode_structured_data method.

Understanding CVE-2022-1930

This section covers the essential details regarding the ReDoS vulnerability in the eth-account package.

What is CVE-2022-1930?

The CVE-2022-1930 vulnerability is related to an inefficient Regular Expression Complexity issue in the eth-account package, allowing attackers to disrupt the service by providing malicious input.

The Impact of CVE-2022-1930

The vulnerability poses a medium severity risk with a CVSS base score of 5.9. It has a high availability impact but does not affect confidentiality or integrity. The attack complexity is rated as high, with the attack vector being network-based.

Technical Details of CVE-2022-1930

In this section, we delve into the technical specifics of the CVE-2022-1930 vulnerability.

Vulnerability Description

The vulnerability arises due to the lack of proper input validation in the encode_structured_data method of the eth-account package, leading to the potential for a ReDoS attack.

Affected Systems and Versions

The eth-account package versions below 0.5.9 are affected by this vulnerability. Users with custom versions are particularly at risk.

Exploitation Mechanism

Attackers can exploit this vulnerability by supplying specially crafted input to the encode_structured_data method, causing a denial of service through excessive CPU consumption.

Mitigation and Prevention

Outlined below are steps to mitigate and prevent exploitation of CVE-2022-1930.

Immediate Steps to Take

Users are advised to update the eth-account package to version 0.5.9 or above to mitigate the ReDoS vulnerability. Additionally, input validation mechanisms should be implemented to sanitize user input.

Long-Term Security Practices

To enhance long-term security, developers should follow secure coding practices, conduct regular security audits, and stay informed about potential vulnerabilities in third-party packages.

Patching and Updates

Regularly check for security patches and updates released by the eth-account package maintainers. Promptly apply patches to ensure the latest security fixes are in place.