CVE-2020-35456 in Diibear App
Summary
by MITRE • 03/17/2021
The Taidii Diibear Android application 2.4.0 and all its derivatives allow attackers to view private chat messages and media files via logcat because of excessive logging.
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Analysis
by VulDB Data Team • 04/02/2021
The vulnerability identified as CVE-2020-35456 affects the Taidii Diibear Android application version 2.4.0 and its subsequent derivatives, presenting a critical security flaw that stems from improper logging practices within the application's codebase. This issue manifests through the application's excessive logging mechanism that inadvertently exposes sensitive user data including private chat messages and media files through the Android logcat system. The flaw represents a significant failure in data protection and privacy controls, as it allows unauthorized access to confidential communications simply by accessing the device's log output.
The technical implementation of this vulnerability involves the application's logging functions that are configured to capture and store sensitive information without proper sanitization or access controls. When the application generates log entries, it includes raw data from user communications and media files, which are then stored in the Android system logs accessible through the logcat utility. This behavior violates fundamental security principles and demonstrates poor input validation and output handling practices within the application's architecture. The vulnerability maps directly to CWE-532, which addresses information exposure through log files, and specifically relates to CWE-200, which covers information exposure to unauthorized actors.
The operational impact of this vulnerability extends beyond simple privacy concerns to encompass potential data breaches and unauthorized access to personal communications. Attackers can exploit this weakness by simply accessing the device's logcat output, which requires minimal technical expertise and no special privileges beyond basic device access. This creates a persistent risk for users who may unknowingly expose their private conversations and media files to anyone with access to their device's logs. The vulnerability affects all users of the application and its derivatives, creating a widespread security risk that persists until the underlying logging mechanisms are properly addressed. The exposure of chat messages and media files through logcat represents a severe breach of user confidentiality and could lead to identity theft, social engineering attacks, or other malicious activities.
Mitigation strategies for this vulnerability must address the root cause through comprehensive code review and security auditing of logging mechanisms within the application. Developers should implement proper log sanitization procedures that exclude sensitive data from log outputs, utilize secure logging frameworks that automatically filter out personal information, and establish access controls for log files. The implementation of the principle of least privilege should be enforced to ensure that logging operations do not capture more information than necessary for application functionality. Additionally, the application should be updated to remove or disable any logging mechanisms that inadvertently capture user communications and media files. Organizations should also consider implementing device-level security controls such as log file encryption and access restrictions, while users should be educated about the risks of exposing device logs. This vulnerability highlights the importance of adhering to security best practices and following frameworks such as the OWASP Mobile Security Project guidelines for secure mobile application development, particularly focusing on proper data handling and logging practices that prevent information leakage through unintended channels.