CVE-2023-40030 : What You Need to Know

This article provides detailed information on CVE-2023-40030, a vulnerability in Rust Cargo that allows malicious dependencies to inject arbitrary JavaScript into cargo-generated timing reports.

Understanding CVE-2023-40030

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

What is CVE-2023-40030?

Cargo in Rust did not properly escape Cargo feature names in timing reports, enabling a malicious package to inject JavaScript, potentially leading to cross-site scripting.

The Impact of CVE-2023-40030

Users relying on dependencies from git, local paths, or alternative registries were affected, while those solely depending on crates.io were unaffected.

Technical Details of CVE-2023-40030

This section explores the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

Cargo did not escape feature names in timing reports, allowing malicious packages to inject JavaScript and potentially execute code.

Affected Systems and Versions

Rust Cargo versions >= 1.60.0 and < 1.72 are impacted by this vulnerability.

Exploitation Mechanism

A malicious package can inject arbitrary JavaScript into cargo-generated timing reports, leading to potential cross-site scripting attacks.

Mitigation and Prevention

This section outlines immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Users are advised to include only trusted dependencies in their projects when using Rust Cargo.

Long-Term Security Practices

Exercise caution when downloading packages and continue monitoring for vulnerabilities in dependencies.

Patching and Updates

The vulnerability was fixed in Rust 1.72 by addressing the feature name escape issue in cargo-generated timing reports.

For more details, refer to the official advisories and GitHub commits provided in the references.