CVE-2021-26307 : Vulnerability Insights and Analysis

This CVE pertains to an issue in the

raw-cpuid

crate before version 9.0.0 for Rust, allowing

__cpuid_count()

calls even on processors that do not support the CPUID instruction, leading to a deterministic crash.

Understanding CVE-2021-26307

This section will delve into the details of CVE-2021-26307, including its impact, technical description, affected systems, exploitation mechanism, mitigation, and prevention.

What is CVE-2021-26307?

CVE-2021-26307 relates to a vulnerability in the

raw-cpuid

crate, enabling certain CPUID calls on unsupported processors, resulting in a predictable system crash.

The Impact of CVE-2021-26307

The impact of this vulnerability is the potential for crashes and denial of service situations due to unsound CPUID instructions execution.

Technical Details of CVE-2021-26307

Let's explore the technical aspects of CVE-2021-26307, shedding light on its vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability allows

__cpuid_count()

calls on processors lacking CPUID support, leading to deterministic system crashes.

Affected Systems and Versions

The affected systems include all instances using the

raw-cpuid

crate before version 9.0.0 for Rust.

Exploitation Mechanism

Exploiting this vulnerability involves triggering unsupported CPUID instructions, causing the system to crash predictably.

Mitigation and Prevention

Discover the recommended mitigation strategies and preventive measures against CVE-2021-26307 to safeguard your system's security.

Immediate Steps to Take

Immediate actions include updating the

raw-cpuid

crate to version 9.0.0 or newer and avoiding unsupported CPUID instructions.

Long-Term Security Practices

Implement long-term security practices such as regular code audits, dependency monitoring, and following secure coding guidelines.

Patching and Updates

Stay informed about security patches and updates related to the

raw-cpuid

crate to address known vulnerabilities and enhance system security.