CVE-2022-47469 : Exploit Details and Defense Strategies

This article provides insights into CVE-2022-47469, a vulnerability in the ext4fsfilter driver, impacting Unisoc devices.

Understanding CVE-2022-47469

CVE-2022-47469 is a vulnerability identified in Unisoc (Shanghai) Technologies Co., Ltd. devices, leading to a potential out of bounds read in the ext4fsfilter driver. The exploitation of this vulnerability may result in a local denial of service, requiring System execution privileges.

What is CVE-2022-47469?

CVE-2022-47469 involves a missing bounds check in the ext4fsfilter driver, enabling attackers to trigger an out of bounds read, potentially causing local denial of service on affected Unisoc devices.

The Impact of CVE-2022-47469

The impact of CVE-2022-47469 includes the risk of a local denial of service on devices running affected Unisoc processors, with System execution privileges needed for successful exploitation.

Technical Details of CVE-2022-47469

CVE-2022-47469 affects Unisoc devices utilizing SC9863A, SC9832E, SC7731E, T610, T310, T606, T760, T610, T618, T606, T612, T616, T760, T770, T820, and S8000 products. The affected versions include Android10 and Android11.

Vulnerability Description

The vulnerability arises from the lack of a bounds check in the ext4fsfilter driver, leading to an out of bounds read that can be exploited for local denial of service attacks.

Affected Systems and Versions

Unisoc devices using SC9863A, SC9832E, SC7731E, T610, T310, T606, T760, T610, T618, T606, T612, T616, T760, T770, T820, and S8000 processors are impacted, specifically those running Android10 and Android11.

Exploitation Mechanism

Exploiting CVE-2022-47469 requires System execution privileges on the targeted Unisoc devices, allowing threat actors to trigger an out of bounds read and conduct local denial of service attacks.

Mitigation and Prevention

To safeguard against CVE-2022-47469:

Immediate Steps to Take

Apply security patches provided by Unisoc promptly.
Monitor official channels for updates and security advisories.

Long-Term Security Practices

Employ security best practices and guidelines for device hardening.
Regularly update devices with the latest firmware releases.

Patching and Updates

Stay informed about security patches and updates released by Unisoc for the impacted devices.
Implement a proactive patch management strategy to mitigate future vulnerabilities.