CVE-2023-21506 Explained : Impact and Mitigation

This CVE-2023-21506 involves an Out-of-bounds Write vulnerability found in the processing of the BC_TUI_CMD_SEND_RESOURCE_DATA_ARRAY command in the bc_tui trustlet from Samsung Blockchain Keystore before version 1.3.12.1. The vulnerability allows a local attacker to execute arbitrary code.

Understanding CVE-2023-21506

This section delves into what CVE-2023-21506 entails, its impact, technical details, and mitigation strategies.

What is CVE-2023-21506?

CVE-2023-21506 is an Out-of-bounds Write vulnerability discovered in Samsung Blockchain Keystore, which could potentially be exploited by a local attacker to run arbitrary code.

The Impact of CVE-2023-21506

The impact of this vulnerability is classified as MEDIUM severity with a CVSS base score of 6.7. It could lead to a local attacker gaining the ability to execute arbitrary code on the affected system with high confidentiality, integrity, and availability impact.

Technical Details of CVE-2023-21506

Taking a closer look at the technical aspects of CVE-2023-21506.

Vulnerability Description

The vulnerability arises while processing the BC_TUI_CMD_SEND_RESOURCE_DATA_ARRAY command in the bc_tui trustlet from Samsung Blockchain Keystore prior to version 1.3.12.1, allowing a local attacker to trigger an out-of-bounds write.

Affected Systems and Versions

The impacted system is Samsung Blockchain Keystore with versions lower than 1.3.12.1, with a version type listed as custom and unspecified version specified.

Exploitation Mechanism

The exploitation of this vulnerability requires local access to the affected system and the execution of specially crafted code to exploit the out-of-bounds write flaw.

Mitigation and Prevention

Guidelines to mitigate the risks associated with CVE-2023-21506.

Immediate Steps to Take

It is crucial to update the Samsung Blockchain Keystore to version 1.3.12.1 or later to address the vulnerability. Additionally, limiting access to trusted users can help reduce the risk of exploitation.

Long-Term Security Practices

Regular security audits and penetration testing can help identify and address such vulnerabilities proactively. Training users on safe computing practices can also contribute to overall cybersecurity resilience.

Patching and Updates

Stay vigilant about security updates and patches released by Samsung Mobile for the Samsung Blockchain Keystore. Implement a robust patch management process to ensure timely application of relevant security patches to mitigate potential risks.