CVE-2023-27108 : Security Advisory and Response

This CVE record pertains to an issue discovered in KaiOS 3.0 that exposes a vulnerability in the pre-installed Communications application, allowing unauthorized access to the user's call log without proper origin or permission checks. This vulnerability enables an attacker to inject a JavaScript payload that can run in a browser or app without user interaction, potentially leading to the extraction and transmission of the user's call logs to a remote server.

Understanding CVE-2023-27108

This section delves into the details of CVE-2023-27108, outlining the vulnerability's impact, technical aspects, and mitigation strategies.

What is CVE-2023-27108?

CVE-2023-27108 is a security flaw in KaiOS 3.0's Communications application that lacks proper security checks, enabling an attacker to access and extract the user's call logs without permission, potentially compromising user privacy and security.

The Impact of CVE-2023-27108

The exploitation of this vulnerability can lead to the unauthorized retrieval of sensitive call log data without user consent, posing a significant risk to user privacy. Attackers could potentially use this information for malicious purposes or unauthorized surveillance.

Technical Details of CVE-2023-27108

In this section, we explore the technical specifics of CVE-2023-27108, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in KaiOS 3.0's Communications application allows for the exposure of the user's call log through a Web Activity without proper origin or permission validation. This oversight enables an attacker to inject a JavaScript payload for unauthorized access to the call logs.

Affected Systems and Versions

The affected system is KaiOS 3.0, specifically the pre-installed Communications application. The vulnerability impacts all versions of KaiOS 3.0, allowing attackers to exploit this issue across compatible devices running the affected software.

Exploitation Mechanism

By leveraging the exposed Web Activity in the Communications application, attackers can inject a JavaScript payload that operates within a browser or app context without user interaction. This payload can then facilitate the extraction and transmission of the user's call logs to a remote server using XMLHttpRequest or Fetch.

Mitigation and Prevention

This section provides insights into mitigating the risks posed by CVE-2023-27108, offering immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Users should exercise caution when using the affected Communications application on KaiOS 3.0 devices and avoid interacting with suspicious or untrusted content that could potentially trigger the unauthorized access to call logs. It is advisable to limit access to sensitive information until a patch or update is available.

Long-Term Security Practices

To enhance overall security posture, users are encouraged to maintain good security hygiene by regularly updating their KaiOS devices, being cautious of app permissions and requests for sensitive data, and staying informed about potential security risks related to their device's software and applications.

Patching and Updates

It is crucial for KaiOS to release a timely patch or update that addresses the vulnerability in the Communications application, implementing proper origin and permission checks to prevent unauthorized access to the user's call logs. Users should promptly install these security updates to secure their devices against potential exploitation of CVE-2023-27108.