CVE-2023-21507 : Vulnerability Insights and Analysis

This CVE-2023-21507 involves an Out-of-bounds Read vulnerability in the processing of the BC_TUI_CMD_SEND_RESOURCE_DATA_ARRAY command within the bc_tui trustlet from Samsung Blockchain Keystore before version 1.3.12.1. This vulnerability could allow a local attacker to read arbitrary memory.

Understanding CVE-2023-21507

In this section, we will delve deeper into the details of CVE-2023-21507 to understand its impact, technical aspects, and mitigation strategies.

What is CVE-2023-21507?

CVE-2023-21507 is an Out-of-bounds Read vulnerability found in the Samsung Blockchain Keystore, specifically in the processing of a certain command. This flaw could be exploited by a local attacker to access unauthorized memory data.

The Impact of CVE-2023-21507

The impact of this vulnerability is rated as MEDIUM according to the CVSS v3.1 base score. It has the potential to compromise the confidentiality of the affected system as it allows an attacker to read arbitrary memory. The integrity and availability of the system, however, remain unaffected.

Technical Details of CVE-2023-21507

Let's explore the technical aspects of CVE-2023-21507, including the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises due to an Out-of-bounds Read issue in the processing of a specific command within the bc_tui trustlet from Samsung Blockchain Keystore, enabling a local attacker to read arbitrary memory.

Affected Systems and Versions

The vulnerability impacts Samsung Blockchain Keystore versions earlier than 1.3.12.1. Systems running these versions are susceptible to exploitation by a local attacker.

Exploitation Mechanism

By leveraging the Out-of-bounds Read vulnerability in the processing of the BC_TUI_CMD_SEND_RESOURCE_DATA_ARRAY command, a local attacker can gain unauthorized access to memory data, potentially leading to information disclosure.

Mitigation and Prevention

To address CVE-2023-21507 and enhance the security posture of affected systems, it is crucial to implement appropriate mitigation and prevention measures promptly.

Immediate Steps to Take

Users and administrators should update Samsung Blockchain Keystore to version 1.3.12.1 or later to mitigate the vulnerability.
Limit access to trusted sources and avoid executing arbitrary commands from unverified users to reduce the risk of exploitation.

Long-Term Security Practices

Regularly monitor security advisories and updates from Samsung Mobile to stay informed about the latest patches and security enhancements.
Conduct regular security assessments and penetration testing to identify and address potential vulnerabilities proactively.

Patching and Updates

Promptly apply security patches and updates released by Samsung Mobile for the Samsung Blockchain Keystore to remediate vulnerabilities and strengthen the overall security posture of the system.