CVE-2020-10027 : Vulnerability Insights and Analysis
Learn about CVE-2020-10027, a high-severity vulnerability in Zephyr RTOS versions 1.14.0 and 2.1.0. Understand the impact, technical details, and mitigation steps to secure affected systems.
CVE-2020-10027, titled 'ARC Platform Uses Signed Integer Comparison When Validating Syscall Numbers,' is a high-severity vulnerability affecting Zephyr RTOS versions 1.14.0 and 2.1.0.
Understanding CVE-2020-10027
This CVE involves a privilege escalation vulnerability that allows an attacker to elevate their privileges to that of the kernel by executing code within a user thread.
What is CVE-2020-10027?
The vulnerability arises from the ARC platform's use of signed integer comparison during syscall number validation, enabling unauthorized privilege escalation.
The Impact of CVE-2020-10027
The impact of this vulnerability is rated as high, with a CVSS base score of 7.8. It poses a significant risk to confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2020-10027
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows an attacker to escalate privileges from a user thread to that of the kernel by exploiting signed integer comparison in syscall number validation.
Affected Systems and Versions
- Affected Product: Zephyr RTOS
- Vendor: Zephyr Project
- Versions: 1.14.0 and later, 2.1.0 and later
Exploitation Mechanism
- Attack Complexity: High
- Attack Vector: Local
- Privileges Required: Low
- User Interaction: None
- Scope: Changed
- Availability Impact: High
- Confidentiality Impact: High
- Integrity Impact: High
Mitigation and Prevention
To address CVE-2020-10027, follow these mitigation strategies:
Immediate Steps to Take
- Apply patches provided by Zephyr Project promptly.
- Monitor security advisories for updates and apply them as soon as they are available.
Long-Term Security Practices
- Implement the principle of least privilege to restrict user access.
- Conduct regular security assessments and penetration testing to identify and remediate vulnerabilities.
Patching and Updates
- Regularly update Zephyr RTOS to the latest secure versions to mitigate known vulnerabilities and enhance system security.