CVE-2020-35906 Explained : Impact and Mitigation

An issue was discovered in the futures-task crate before 0.3.6 for Rust. The futures_task::waker component may lead to a use-after-free vulnerability in a non-static type scenario.

Understanding CVE-2020-35906

This CVE identifies a specific vulnerability in the futures-task crate for Rust.

What is CVE-2020-35906?

The vulnerability in the futures-task crate before version 0.3.6 allows for a use-after-free exploit in certain non-static type situations.

The Impact of CVE-2020-35906

The use-after-free vulnerability could potentially be exploited by malicious actors to execute arbitrary code or cause a denial of service (DoS) attack.

Technical Details of CVE-2020-35906

This section delves into the technical aspects of the CVE.

Vulnerability Description

The issue lies within the futures_task::waker component, which can be manipulated to trigger a use-after-free condition.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions before 0.3.6

Exploitation Mechanism

The vulnerability can be exploited by crafting specific inputs to the futures_task::waker component, leading to memory corruption and potential code execution.

Mitigation and Prevention

Protecting systems from CVE-2020-35906 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the futures-task crate to version 0.3.6 or newer to mitigate the vulnerability.
Monitor for any unusual behavior that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update dependencies and libraries to patch known vulnerabilities.
Implement secure coding practices to prevent similar memory-related vulnerabilities.

Patching and Updates

Stay informed about security advisories and updates related to the futures-task crate and apply patches promptly to ensure system security.