CVE-2021-25373 : Security Advisory and Response

This article provides detailed information about CVE-2021-25373, a vulnerability found in Samsung Mobile's Customization Service.

Understanding CVE-2021-25373

CVE-2021-25373 is a vulnerability that affects Samsung Mobile's Customization Service versions prior to 2.2.02.1 in Android O(8.x), 2.4.03.0 in Android P(9.0), 2.7.02.1 in Android Q(10.0), and 2.9.01.1 in Android R(11.0).

What is CVE-2021-25373?

The vulnerability involves using unsafe PendingIntent in Customization Service, allowing local attackers to perform unauthorized actions without permission by hijacking the PendingIntent.

The Impact of CVE-2021-25373

CVE-2021-25373 has a base score of 5.5, with a medium severity level. It primarily affects confidentiality, with low privileges required for exploitation.

Technical Details of CVE-2021-25373

CVE-2021-25373 is categorized under CWE-285 - Improper Authorization.

Vulnerability Description

The vulnerability arises from improper authorization mechanisms in Customization Service, leading to unauthorized actions via PendingIntent hijacking.

Affected Systems and Versions

The affected versions include Customization Service on Android O(8.x), Android P(9.0), Android Q(10.0), and Android R(11.0) prior to the specified versions.

Exploitation Mechanism

Local attackers can exploit this vulnerability by hijacking the PendingIntent in Customization Service to perform unauthorized actions.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-25373, users and organizations are advised to take the following steps:

Immediate Steps to Take

Update Customization Service to versions 2.2.02.1 for Android O(8.x), 2.4.03.0 for Android P(9.0), 2.7.02.1 for Android Q(10.0), and 2.9.01.1 for Android R(11.0).
Monitor for any unauthorized actions on affected systems.

Long-Term Security Practices

Regularly update software and apply security patches.
Educate users and developers on secure coding practices and potential vulnerabilities.

Patching and Updates

Stay informed about security updates from Samsung Mobile and promptly apply any patches to mitigate the risk of exploitation.