CVE-2021-25459 : Exploit Details and Defense Strategies

An improper access control vulnerability in sspInit() in BlockchainTZService prior to SMR Sep-2021 Release 1 allows attackers to start BlockchainTZService.

Understanding CVE-2021-25459

This CVE impacts Samsung Mobile Devices and falls under the category of Improper Authorization vulnerability.

What is CVE-2021-25459?

The vulnerability exists in the sspInit() function of BlockchainTZService before SMR Sep-2021 Release 1, enabling malicious actors to initiate BlockchainTZService without proper access control.

The Impact of CVE-2021-25459

With a CVSS base score of 4 and a base severity level of MEDIUM, this vulnerability poses a threat to the integrity and availability of affected devices, potentially allowing unauthorized parties to manipulate the service.

Technical Details of CVE-2021-25459

This section covers specific technical aspects of the CVE.

Vulnerability Description

The vulnerability arises due to improper access control in the sspInit() function, paving the way for unauthorized invocation of BlockchainTZService.

Affected Systems and Versions

Select Q(10.0) and R(11.0) devices running versions prior to SMR Sep-2021 Release 1 are impacted by this vulnerability.

Exploitation Mechanism

Attackers with local access can exploit this vulnerability to start BlockchainTZService without the necessary authorization.

Mitigation and Prevention

To safeguard your Samsung Mobile Devices from CVE-2021-25459, consider the following preventive measures.

Immediate Steps to Take

Update your device to the latest SMR Sep-2021 Release 1 or newer to patch the vulnerability.
Regularly check for security updates from Samsung Mobile to stay protected against potential threats.

Long-Term Security Practices

Implement strong access control mechanisms to restrict unauthorized usage of critical services on your devices.
Train users on device security best practices to mitigate the risk of exploitation.

Patching and Updates

Ensure timely installation of security updates released by Samsung Mobile to address known vulnerabilities and enhance the overall security posture.