CVE-2020-10058 : Security Advisory and Response

Multiple syscalls in the Kscan subsystem perform insufficient argument validation, potentially allowing code in userspace to gain elevated privileges.

Understanding CVE-2020-10058

This CVE involves a vulnerability in the Zephyr project's Real-Time Operating System (RTOS) affecting version 2.1.0 and later.

What is CVE-2020-10058?

The vulnerability arises from inadequate argument validation in multiple syscalls within the Kscan subsystem.
Attackers executing code in userspace could exploit this flaw to elevate their privileges.

The Impact of CVE-2020-10058

CVSS Base Score: 7.8 (High)
Attack Vector: Local
Attack Complexity: High
Privileges Required: Low
Scope: Changed
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2020-10058

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability allows attackers to potentially gain elevated privileges by exploiting insufficient argument validation in the Kscan subsystem.

Affected Systems and Versions

Affected Product: Zephyr
Vendor: Zephyrproject-rtos
Vulnerable Version: 2.1.0 and later

Exploitation Mechanism

Attackers executing code in userspace can leverage the lack of proper argument validation in syscalls to escalate their privileges.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Zephyr RTOS to a patched version that addresses the vulnerability.
Monitor for any unusual activities on the system that could indicate exploitation.

Long-Term Security Practices

Implement the principle of least privilege to restrict unnecessary access.
Regularly update and patch software to mitigate potential vulnerabilities.

Patching and Updates

Apply patches provided by Zephyrproject-rtos to fix the vulnerability and enhance system security.