CVE-2021-27495 in mylife Cloud
Summary
by MITRE • 07/31/2021
Ypsomed mylife Cloud, mylife Mobile Application:Ypsomed mylife Cloud,All versions prior to 1.7.2,Ypsomed mylife App,All versions prior to 1.7.5,he Ypsomed mylife Cloud reflects the user password during the login process after redirecting the user from a HTTPS endpoint to a HTTP endpoint.
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Analysis
by VulDB Data Team • 08/06/2021
The vulnerability identified as CVE-2021-27495 affects the Ypsomed mylife Cloud and mylife Mobile Application systems, specifically targeting versions prior to 1.7.2 for the cloud component and 1.7.5 for the mobile application. This security flaw represents a critical weakness in the authentication process that occurs during user login operations. The vulnerability manifests when the system redirects users from a secure HTTPS endpoint to an insecure HTTP endpoint during the authentication workflow, creating a potential attack vector for credential interception.
The technical flaw stems from improper handling of secure communication protocols within the application's redirect mechanism. When users attempt to log in to the mylife Cloud system, the application initially establishes a secure HTTPS connection to validate the user's credentials. However, during the authentication process, the system subsequently redirects the user to an HTTP endpoint, which operates without encryption. This protocol downgrade exposes the user's password in plaintext format during the redirect process, as the HTTP protocol transmits data without any form of encryption or data protection.
This vulnerability directly maps to CWE-312, which describes the exposure of sensitive information through improper handling of data. The flaw represents a classic case of insecure credential transmission where user authentication data becomes vulnerable to interception attacks. The operational impact of this vulnerability is significant as it allows attackers to capture user passwords during the login process, potentially enabling unauthorized access to user accounts and sensitive medical information stored within the mylife application ecosystem. The exposure of credentials could lead to account takeover scenarios, data breaches, and potential privacy violations given the nature of medical information handled by the system.
The security implications extend beyond simple credential theft, as this vulnerability creates opportunities for attackers to leverage the compromised credentials for further malicious activities within the application's ecosystem. According to ATT&CK framework, this vulnerability aligns with T1566, which covers credential harvesting through social engineering or exploitation of authentication mechanisms. The attack surface is particularly concerning given that the vulnerability affects both cloud and mobile application components, potentially allowing attackers to compromise user accounts across multiple platforms. Organizations using these applications face heightened risk of unauthorized access to patient data, which could result in regulatory violations under healthcare data protection regulations such as HIPAA or GDPR.
Mitigation strategies should focus on implementing proper protocol handling within the authentication redirect mechanisms, ensuring that all communication channels remain encrypted throughout the entire login process. The most effective remediation involves updating to versions 1.7.2 and 1.7.5 respectively for the cloud and mobile applications, which address the insecure HTTP redirection issue. Additionally, organizations should implement strict security policies that prevent protocol downgrades during authentication processes and ensure that all endpoints maintain consistent security levels throughout user sessions. Network monitoring should be enhanced to detect and alert on any attempts to establish insecure connections during authentication flows, providing an additional layer of protection against exploitation of this vulnerability.