CVE-2022-20373 : Security Advisory and Response

Android devices are impacted by a vulnerability identified as CVE-2022-20373, which could allow an attacker to achieve local escalation of privilege without requiring user interaction. This article provides an overview of the issue, its impact, technical details, and mitigation strategies.

Understanding CVE-2022-20373

This section delves into the specifics of CVE-2022-20373, shedding light on the nature of the vulnerability and its implications.

What is CVE-2022-20373?

The vulnerability exists in st21nfc_loc_set_polaritymode of fc/st21nfc.c, presenting a potential use after free scenario triggered by a race condition. The exploitation of this flaw could result in an attacker gaining elevated privileges on the local system.

The Impact of CVE-2022-20373

If successfully exploited, CVE-2022-20373 could lead to a local escalation of privilege, allowing the attacker to execute malicious activities with system-level privileges. Notably, this exploit does not necessitate any user interaction, raising the severity of the threat.

Technical Details of CVE-2022-20373

This section provides more technical insights into the vulnerability, including its description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from a race condition in the Android kernel's st21nfc_loc_set_polaritymode, leading to potential use after free situations. This flaw could be abused by an attacker to escalate their privileges locally.

Affected Systems and Versions

The impacted systems include Android devices utilizing the Android kernel. Specifically, the vulnerability lies within this kernel version, making devices susceptible to exploitation.

Exploitation Mechanism

Exploiting CVE-2022-20373 requires triggering the use after free scenario through the race condition present in the st21nfc_loc_set_polaritymode function. By successfully exploiting this mechanism, an attacker can elevate their privileges on the affected system.

Mitigation and Prevention

This section outlines the necessary steps to mitigate the risks posed by CVE-2022-20373 and prevent potential exploitation.

Immediate Steps to Take

To address the vulnerability, users are advised to apply security patches and updates provided by Android vendors promptly. Timely patching is crucial to eliminate the risk of exploitation.

Long-Term Security Practices

In addition to patching, users should adopt long-term security practices such as regularly updating their devices, practicing secure computing habits, and remaining vigilant against potential threats.

Patching and Updates

Android users should stay informed about security bulletins and updates released by Android vendors to address CVE-2022-20373. Applying the latest patches promptly is vital in safeguarding devices against potential attacks.