CVE-2023-28647 : Vulnerability Insights and Analysis

This CVE involves a vulnerability in the Nextcloud iOS application that allows an attacker with physical access to bypass the app pin/password protection and gain access to user's files.

Understanding CVE-2023-28647

The vulnerability in Nextcloud iOS allows an attacker to integrate the app into the iOS Files app and bypass the pin/password protection, potentially compromising user data.

What is CVE-2023-28647?

In versions of Nextcloud iOS prior to 4.7.0, an attacker with physical access to an unlocked device can exploit this vulnerability to access user files without the required pin/password protection.

The Impact of CVE-2023-28647

The impact of this vulnerability is rated as medium severity with a CVSS base score of 4.4. It poses a risk to the confidentiality and integrity of user data stored within the Nextcloud iOS application.

Technical Details of CVE-2023-28647

This vulnerability is categorized under the CWE-281 (Improper Preservation of Permissions) and CWE-287 (Improper Authentication) types. The CVSS v3.1 metrics indicate high attack complexity with low impact on availability, confidentiality, and integrity. User interaction is required, and the privileges required for exploitation are low.

Vulnerability Description

The vulnerability allows an attacker with physical access to a device to bypass the Nextcloud pin/password protection and gain unauthorized access to user files.

Affected Systems and Versions

The affected product is Nextcloud's security-advisories with versions prior to 4.7.0. Users of Nextcloud iOS versions below 4.7.0 are at risk of exploitation.

Exploitation Mechanism

The attacker needs physical access to an unlocked device to exploit the vulnerability and integrate the Nextcloud iOS app into the iOS Files app to bypass pin/password protection.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-28647, users are advised to take immediate action to secure their data and prevent unauthorized access.

Immediate Steps to Take

Upgrade the Nextcloud iOS app to version 4.7.0 or above to address the vulnerability and enhance the security of user data. Additionally, users should ensure their devices are not left unlocked and unattended to prevent physical access by potential attackers.

Long-Term Security Practices

Practice good device security habits such as setting up screen lock mechanisms, restricting physical access to devices, and regularly updating applications to protect against known vulnerabilities.

Patching and Updates

Stay informed about security advisories and updates provided by Nextcloud to promptly patch any identified vulnerabilities and maintain a secure app environment. Regularly check for software updates and apply them as soon as they are available to ensure the latest security features are in place.