CVE-2021-27503 : Security Advisory and Response

Ypsomed mylife Cloud and mylife Mobile Application versions prior to 1.7.2 and 1.7.5 are affected by a vulnerability. The issue lies in the communication protocol encryption based on hard-coded secrets, potentially enabling man-in-the-middle attacks.

Understanding CVE-2021-27503

This CVE identifies a security vulnerability in Ypsomed mylife Cloud and mylife Mobile Application versions prior to 1.7.2 and 1.7.5, allowing for potential tampering of messages by attackers intercepting the communication between the two.

What is CVE-2021-27503?

The vulnerability in Ypsomed mylife Cloud and mylife Mobile Application versions stems from the use of hard-coded secrets for encrypting communication between the two systems. This flaw may be exploited by malicious actors to manipulate messages and compromise the integrity of the communication.

The Impact of CVE-2021-27503

The impact of CVE-2021-27503 could result in man-in-the-middle attacks where unauthorized third parties intercept and modify the communication between the Ypsomed mylife Cloud and mylife Mobile Application. This could lead to potential data tampering and unauthorized access.

Technical Details of CVE-2021-27503

This section covers the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability arises from the insecure encryption mechanism based on hard-coded credentials used in the communication protocol between Ypsomed mylife Cloud and mylife Mobile Application.

Affected Systems and Versions

Ypsomed mylife Cloud and mylife Mobile Application versions prior to 1.7.2 and 1.7.5 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by intercepting the communication between Ypsomed mylife Cloud and mylife Mobile Application, leveraging the hard-coded secrets to tamper with the messages.

Mitigation and Prevention

This section focuses on immediate steps to take and long-term security practices to mitigate the risks associated with CVE-2021-27503.

Immediate Steps to Take

Users are advised to update the Ypsomed mylife Cloud and mylife Mobile Application to versions 1.7.2 and 1.7.5 or later to mitigate the vulnerability. Additionally, monitoring network communications for anomalies is recommended.

Long-Term Security Practices

Implementing secure communication protocols, avoiding hard-coded credentials, and regularly updating systems are essential long-term security practices to prevent similar vulnerabilities.

Patching and Updates

Vendor-provided patches and updates should be promptly applied to ensure systems are protected against potential exploits related to CVE-2021-27503.