CVE-2023-21445 : What You Need to Know

This CVE record was published on February 9, 2023, by Samsung Mobile. It highlights an improper access control vulnerability in MyFiles prior to certain versions in Android R(11), Android S(12), and Android T(13). This vulnerability allows a local attacker to write a file with MyFiles privilege via implicit intent.

Understanding CVE-2023-21445

This section delves into the details of CVE-2023-21445, discussing the vulnerability, its impact, technical aspects, and mitigation strategies.

What is CVE-2023-21445?

CVE-2023-21445 is an improper access control vulnerability present in MyFiles before specific versions in various Android operating systems. It enables a local attacker to write a file with MyFiles privilege through implicit intent, potentially leading to unauthorized access and data manipulation.

The Impact of CVE-2023-21445

The impact of CVE-2023-21445 is rated as medium severity. The vulnerability can be exploited by a local attacker with specific privileges, resulting in high confidentiality impacts but no direct integrity or availability impact.

Technical Details of CVE-2023-21445

This section provides deeper insights into the technical aspects of CVE-2023-21445, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from improper access control in MyFiles, allowing local attackers to write files with elevated privileges via implicit intent, potentially compromising the confidentiality of sensitive data.

Affected Systems and Versions

This vulnerability affects MyFiles versions less than 12.2.09 in Android R(11), 13.1.03.501 in Android S(12), and 14.1.00.422 in Android T(13).

Exploitation Mechanism

The exploitation of CVE-2023-21445 involves a local attacker leveraging the vulnerability in MyFiles to write files with MyFiles privileges through implicit intent, bypassing proper access controls.

Mitigation and Prevention

In response to CVE-2023-21445, users and organizations are advised to take immediate steps, implement long-term security practices, and apply relevant patches and updates for protection against potential exploits.

Immediate Steps to Take

Promptly updating affected systems to versions that include proper access control measures, such as explicit intent usage, can mitigate the risks associated with CVE-2023-21445.

Long-Term Security Practices

Adopting comprehensive access control mechanisms, conducting regular security assessments, and enhancing user privilege management are crucial long-term security practices to prevent vulnerabilities like CVE-2023-21445.

Patching and Updates

Ensuring that MyFiles are updated to versions 12.2.09 in Android R(11), 13.1.03.501 in Android S(12), and 14.1.00.422 in Android T(13) or higher, which address the improper access control vulnerability, is essential to safeguard against potential exploitation.