CVE-2021-45710 : What You Need to Know

An issue was discovered in the tokio crate before 1.8.4, and 1.9.x through 1.13.x before 1.13.1, for Rust. In certain circumstances involving a closed oneshot channel, there is a data race and memory corruption.

Understanding CVE-2021-45710

This CVE describes a vulnerability in the tokio crate that could lead to data race and memory corruption.

What is CVE-2021-45710?

The vulnerability in the affected versions of the tokio crate can be exploited under specific conditions related to a closed oneshot channel, resulting in data race and memory corruption.

The Impact of CVE-2021-45710

The vulnerability could potentially allow an attacker to trigger a data race leading to memory corruption, which may be exploited for malicious purposes.

Technical Details of CVE-2021-45710

This section provides more technical insights into the CVE.

Vulnerability Description

The issue in the tokio crate before version 1.8.4 and 1.9.x through 1.13.x before 1.13.1 involves a data race and memory corruption when encountering a closed oneshot channel.

Affected Systems and Versions

Versions before 1.8.4 of the tokio crate
Versions 1.9.x through 1.13.x before 1.13.1 of the crate

Exploitation Mechanism

Exploiting this vulnerability requires specific circumstances involving a closed oneshot channel, leading to data race and subsequent memory corruption.

Mitigation and Prevention

To address CVE-2021-45710, the following steps are recommended:

Immediate Steps to Take

Upgrade tokio crate to version 1.13.1 or newer
Monitor for any unusual activity related to oneshot channels
Implement strict input validation and error handling mechanisms

Long-Term Security Practices

Regularly update and patch software dependencies
Conduct security audits and code reviews to identify and mitigate potential vulnerabilities

Patching and Updates

Apply patches provided by the tokio crate maintainers promptly to mitigate the vulnerability