CVE-2021-1867 : Vulnerability Insights and Analysis
Learn about CVE-2021-1867, a critical out-of-bounds read vulnerability in Apple iOS, iPadOS, and macOS, allowing malicious applications to execute arbitrary code with kernel privileges.
This article provides an in-depth overview of CVE-2021-1867, a security vulnerability affecting iOS, iPadOS, and macOS systems.
Understanding CVE-2021-1867
CVE-2021-1867 is an out-of-bounds read vulnerability that allows a malicious application to execute arbitrary code with kernel privileges on affected devices.
What is CVE-2021-1867?
An out-of-bounds read issue was fixed in iOS 14.5 and iPadOS 14.5, as well as macOS Big Sur 11.3. The vulnerability could enable unauthorized code execution.
The Impact of CVE-2021-1867
The security flaw could be exploited by a malicious app to gain kernel privileges and execute code without user permission, posing a significant risk to device security.
Technical Details of CVE-2021-1867
CVE ID: CVE-2021-1867 Published Date: 2021-09-08 Affected Vendor: Apple
Vulnerability Description
The vulnerability involves an out-of-bounds read, which was addressed through enhanced input validation in the affected operating systems.
Affected Systems and Versions
- iOS and iPadOS versions below 14.5
- macOS versions below 11.3
Exploitation Mechanism
A malicious application could leverage this vulnerability to execute arbitrary code with elevated kernel privileges, potentially leading to system compromise.
Mitigation and Prevention
Addressing CVE-2021-1867 requires immediate action and proactive security measures to safeguard devices and sensitive data.
Immediate Steps to Take
- Update affected devices to iOS 14.5, iPadOS 14.5, or macOS Big Sur 11.3 to mitigate the vulnerability.
- Avoid downloading apps from untrusted sources to minimize the risk of exploitation.
Long-Term Security Practices
- Regularly install security updates and patches provided by Apple to protect against known vulnerabilities.
- Implement endpoint security solutions and best practices to enhance device security posture.
Patching and Updates
Apple has released updates addressing CVE-2021-1867 in iOS 14.5, iPadOS 14.5, and macOS Big Sur 11.3. Users are advised to apply these patches promptly to prevent potential security incidents.