CVE-2020-35859 : Exploit Details and Defense Strategies

An issue was discovered in the lucet-runtime-internals crate before 0.5.1 for Rust. It mishandles sigstack allocation, potentially leading to sensitive information exposure and memory corruption.

Understanding CVE-2020-35859

This CVE involves a vulnerability in the lucet-runtime-internals crate for Rust.

What is CVE-2020-35859?

The vulnerability mishandles sigstack allocation, allowing guest programs to potentially access sensitive information or experience memory corruption.

The Impact of CVE-2020-35859

The vulnerability could result in guest programs obtaining sensitive data or encountering memory corruption, posing a security risk.

Technical Details of CVE-2020-35859

This section provides technical details of the CVE.

Vulnerability Description

The issue lies in the mishandling of sigstack allocation within the lucet-runtime-internals crate for Rust.

Affected Systems and Versions

Affected Versions: lucet-runtime-internals crate versions before 0.5.1
Affected Products: Not applicable
Affected Vendor: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by guest programs to access sensitive information or cause memory corruption.

Mitigation and Prevention

Protective measures to address CVE-2020-35859.

Immediate Steps to Take

Update the lucet-runtime-internals crate to version 0.5.1 or later.
Monitor for any unusual guest program behavior.

Long-Term Security Practices

Regularly update software components to patch known vulnerabilities.
Implement secure coding practices to prevent similar issues in the future.

Patching and Updates

Ensure timely application of patches and updates to all relevant software components to mitigate the vulnerability.