CVE-2021-25471 Explained : Impact and Mitigation
Learn about CVE-2021-25471 impacting Samsung Mobile Devices, leading to denial of service and battery depletion. Find mitigation steps and security best practices here.
A lack of replay attack protection in Security Mode Command process prior to SMR Oct-2021 Release 1 can lead to denial of service on mobile network connection and battery depletion.
Understanding CVE-2021-25471
This article provides insights into the CVE-2021-25471 vulnerability affecting Samsung Mobile Devices.
What is CVE-2021-25471?
CVE-2021-25471 is a vulnerability in Samsung Mobile Devices that lacks replay attack protection in the Security Mode Command process, potentially resulting in denial of service on mobile network connection and battery depletion.
The Impact of CVE-2021-25471
The impact of this vulnerability includes a low availability impact and a low base severity score of 3.7 due to the lack of confidentiality and integrity impact. Attack complexity is high, and privilege requirements are none.
Technical Details of CVE-2021-25471
This section delves into the technical details surrounding CVE-2021-25471 vulnerability.
Vulnerability Description
The vulnerability arises from a lack of replay attack protection in the Security Mode Command process before SMR Oct-2021 Release 1, leading to potential denial of service and battery drainage on affected Samsung Mobile Devices.
Affected Systems and Versions
Samsung Mobile Devices running versions O(8.1), P(9.0), Q(10.0) with Exynos CP chipsets before SMR Oct-2021 Release 1 are affected by this vulnerability.
Exploitation Mechanism
The vulnerability is network-based with a high attack complexity, requiring no user interaction and no privileges.
Mitigation and Prevention
This section outlines the necessary steps to mitigate and prevent exploitation of CVE-2021-25471.
Immediate Steps to Take
Users are advised to update their Samsung Mobile Devices to SMR Oct-2021 Release 1 or later to address this vulnerability. Additionally, exercise caution while connecting to mobile networks.
Long-Term Security Practices
Implement proper input validation mechanisms and stay informed about security updates from Samsung Mobile to enhance long-term security posture.
Patching and Updates
Regularly check for security updates from Samsung Mobile and promptly apply patches to protect against known vulnerabilities.