CVE-2021-25473 : Security Advisory and Response

A vulnerability in Samsung Mobile Devices allows an attacker to cause a denial of service pre-factory reset, affecting devices running custom version R(11.0).

Understanding CVE-2021-25473

This CVE details how improper exception handling in SystemUI can lead to a denial-of-service attack on user devices.

What is CVE-2021-25473?

The CVE-2021-25473 vulnerability involves improper exception handling for a specific value in SystemUI, allowing an attacker to trigger a permanent denial of service before a factory reset.

The Impact of CVE-2021-25473

This vulnerability has a CVSS base score of 4.4 and a base severity level of MEDIUM. It requires high privileges and has a high availability impact.

Technical Details of CVE-2021-25473

This section provides detailed technical information regarding the vulnerability.

Vulnerability Description

Assuming shell privileges are gained, improper exception handling in SystemUI before SMR Oct-2021 Release 1 allows attackers to initiate a permanent denial of service before a factory reset.

Affected Systems and Versions

The affected product is Samsung Mobile Devices, specifically devices running custom version R(11.0) before SMR Oct-2021 Release 1.

Exploitation Mechanism

The vulnerability can be exploited by manipulating the multi_sim_bar_hide_by_media_full value in SystemUI to trigger the denial-of-service attack.

Mitigation and Prevention

To address CVE-2021-25473, users and organizations can take the following steps.

Immediate Steps to Take

Implement security updates provided by Samsung Mobile to mitigate the vulnerability and prevent potential attacks.

Long-Term Security Practices

Regularly update devices with the latest security patches to protect against known vulnerabilities and enhance overall security posture.

Patching and Updates

Stay informed about security advisories from Samsung Mobile and promptly apply relevant patches to secure devices and data.