CVE-2021-37705 : What You Need to Know
Discover the critical CVE-2021-37705 affecting Microsoft's OneFuzz platform versions >= 2.12.0 and < 2.31.0. Learn about the impact, technical details, and mitigation steps to secure your systems.
OneFuzz is an open source self-hosted Fuzzing-As-A-Service platform by Microsoft. This CVE, affecting versions >= 2.12.0 and < 2.31.0, involves an incomplete authorization check that allows unauthorized access to sensitive data and potential code execution on Azure compute resources. The issue is considered critical with a CVSS base score of 10.
Understanding CVE-2021-37705
This section delves into the details of CVE-2021-37705.
What is CVE-2021-37705?
CVE-2021-37705 involves Improper Authorization and Origin Validation Error in OneFuzz, enabling unauthorized users to access private data and execute code on Azure resources.
The Impact of CVE-2021-37705
The impact includes unauthorized access to sensitive data, potential code tampering, and execution on Azure compute resources, posing a critical security threat.
Technical Details of CVE-2021-37705
This section outlines the technical aspects of CVE-2021-37705.
Vulnerability Description
The vulnerability arises from an incomplete authorization check, allowing authenticated users to make authorized API calls to vulnerable OneFuzz instances.
Affected Systems and Versions
Versions >= 2.12.0 and < 2.31.0 of OneFuzz are affected, requiring immediate attention and mitigation.
Exploitation Mechanism
Unauthorized users can exploit this vulnerability to gain read/write access to sensitive data and execute unauthorized code on Azure compute resources.
Mitigation and Prevention
This section focuses on mitigating and preventing the impact of CVE-2021-37705.
Immediate Steps to Take
Users are advised to update to version 2.31.0 or newer to address this vulnerability. As a temporary workaround, restricting access to the tenant can mitigate the risk.
Long-Term Security Practices
Implementing robust access controls and regular security updates can enhance the security posture and prevent similar vulnerabilities in the future.
Patching and Updates
Regularly updating OneFuzz to the latest version, following security best practices, and monitoring for security advisories are crucial to staying protected.