CVE-2022-29185 : What You Need to Know

A detailed look into the Observable Timing Discrepancy vulnerability in the Rust library totp-rs.

Understanding CVE-2022-29185

This CVE discloses a vulnerability in the totp-rs Rust library that allows potential exploitation through observable timing discrepancies.

What is CVE-2022-29185?

totp-rs is a Rust library enabling the development of 2FA authentication tokens per time-based one-time password. Before version 1.1.0, the library lacked constant-time token comparison, potentially allowing attackers to guess and reuse TOTP tokens within the same time window.

The Impact of CVE-2022-29185

The vulnerability's CVSS score is 4.2, categorizing it as medium severity. It requires a high level of privileges but does not impact availability, affecting confidentiality due to observable timing discrepancies.

Technical Details of CVE-2022-29185

This section covers the specific technical aspects of the vulnerability.

Vulnerability Description

totp-rs lacked constant-time token comparison before version 1.1.0, enabling attackers to potentially guess and reuse TOTP tokens in the same time window.

Affected Systems and Versions

The vulnerability affects totp-rs versions prior to 1.1.0.

Exploitation Mechanism

Attackers with prior knowledge of a password could exploit the lack of constant-time comparison to guess and reuse TOTP tokens.

Mitigation and Prevention

Learn how to mitigate the impact of CVE-2022-29185 and prevent similar vulnerabilities in the future.

Immediate Steps to Take

Upgrade to version 1.1.0 or newer to ensure constant-time comparison and mitigate the risk of exploiting timing discrepancies.

Long-Term Security Practices

Adopting secure coding practices and conducting regular security audits can help prevent similar vulnerabilities.

Patching and Updates

Stay informed about security advisories and promptly apply patches and updates to address known vulnerabilities.