CVE-2020-35905 : What You Need to Know

An issue was discovered in the futures-util crate before 0.3.7 for Rust. MutexGuard::map can cause a data race for certain closure situations (in safe code).

Understanding CVE-2020-35905

This CVE identifies a vulnerability in the futures-util crate for Rust that can lead to a data race in specific closure scenarios.

What is CVE-2020-35905?

The vulnerability in the MutexGuard::map function within the futures-util crate can result in a data race under certain conditions in safe code.

The Impact of CVE-2020-35905

The data race issue can potentially lead to unexpected behavior, data corruption, or crashes in affected Rust applications.

Technical Details of CVE-2020-35905

The technical aspects of this CVE are as follows:

Vulnerability Description

The vulnerability lies in the MutexGuard::map function, allowing for data race occurrences in specific closure situations.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions before 0.3.7 of the futures-util crate for Rust

Exploitation Mechanism

The vulnerability can be exploited by triggering specific closure scenarios that utilize the MutexGuard::map function, leading to a data race.

Mitigation and Prevention

To address CVE-2020-35905, consider the following mitigation strategies:

Immediate Steps to Take

Update the futures-util crate to version 0.3.7 or newer to mitigate the data race vulnerability.
Review and modify code that utilizes MutexGuard::map to prevent data race conditions.

Long-Term Security Practices

Regularly update dependencies and libraries to ensure the latest security patches are applied.
Conduct thorough code reviews to identify and address potential data race issues in Rust applications.

Patching and Updates

Apply patches and updates promptly to address known vulnerabilities and enhance the security posture of Rust applications.