CVE-2022-21748 : Security Advisory and Response

A missing permission check in telephony can lead to a local information disclosure vulnerability affecting various MediaTek processors running Android 11.0 and 12.0.

Understanding CVE-2022-21748

In telephony, a missing permission check has been identified as a potential risk, requiring user interaction for exploitation.

What is CVE-2022-21748?

The vulnerability in telephony may result in an information disclosure, where local data could be exposed. This flaw necessitates User execution privileges for successful exploitation.

The Impact of CVE-2022-21748

The vulnerability could allow threat actors to access sensitive information locally, posing a risk to user privacy and security.

Technical Details of CVE-2022-21748

Vulnerability Description

The issue stems from a missing permission check within telephony functions, opening up the possibility of unauthorized information access.

Affected Systems and Versions

Processors including MT6580, MT6735, MT6737, and more by MediaTek running Android 11.0 and 12.0 are affected by this vulnerability.

Exploitation Mechanism

To exploit this vulnerability, user interaction is required, and an attacker with User execution privileges could potentially disclose sensitive local data.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to apply software patches promptly to mitigate the risk of information disclosure and enhance the security of their devices.

Long-Term Security Practices

Practicing caution while interacting with unknown sources and maintaining up-to-date security measures can help prevent exploitation of such vulnerabilities.

Patching and Updates

MediaTek has provided a patch ID: ALPS06511030 to address the vulnerability. Ensure timely installation of updates to safeguard against potential exploits.