CVE-2025-5345 in com.bluebird.filemanagers
Summary
by MITRE • 07/17/2025
Bluebird devices contain a pre-loaded file manager application. This application exposes an unsecured service provider "com.bluebird.system.koreanpost.IsdcardRemoteService". A local attacker can bind to the AIDL-type service to copy and delete arbitrary files from device's storage with system-level permissions.
Version 1.4.4 is vulnerable, vendor reverted vulnerable versions to older version: 1.3.6
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Analysis
by VulDB Data Team • 07/17/2025
The vulnerability identified as CVE-2025-5345 affects Bluebird devices through a pre-loaded file manager application that exposes an insecure service provider. This service provider named "com.bluebird.system.koreanpost.IsdcardRemoteService" operates as an Android Interface Definition Language (AIDL) service, which is a mechanism for enabling communication between processes on Android systems. The flaw stems from improper security controls within the service implementation, allowing unauthorized local access to system-level file operations. The service operates without proper authentication or authorization checks, creating a critical security gap that can be exploited by any local attacker with access to the device.
The technical implementation of this vulnerability involves the exposure of a system-level service that should normally be restricted to authorized components only. When a local attacker successfully binds to this AIDL service, they gain the ability to execute file operations that would typically require system-level privileges. This includes copying and deleting arbitrary files from the device's storage, effectively bypassing normal Android security boundaries. The service operates at the system level, meaning that the attacker can access sensitive data and system files that should normally be protected from unauthorized access. The vulnerability demonstrates a classic case of insufficient access control where a service intended for legitimate system functions is exposed without proper security enforcement mechanisms.
The operational impact of this vulnerability is severe as it allows local attackers to perform destructive file operations with elevated privileges. An attacker could potentially delete critical system files, copy sensitive user data, or manipulate the device's file system in ways that could compromise the entire device's functionality. This type of vulnerability is particularly dangerous because it requires no network connectivity or external attack vectors, making it exploitable through local physical access or through other compromised applications on the device. The exposure of system-level file operations could lead to complete device compromise, data loss, or the ability to install malicious software that persists across reboots. The vulnerability affects version 1.4.4 of the affected software, which represents a regression from the previously stable version 1.3.6.
The remediation approach for this vulnerability involves reverting to the previous stable version 1.3.6 as implemented by the vendor, which demonstrates the importance of proper version control and security regression testing. However, a more comprehensive approach should include implementing proper access controls for all system services, enforcing authentication mechanisms, and conducting thorough security reviews of all exposed AIDL interfaces. The vulnerability aligns with CWE-284 which addresses improper access control, and could be mapped to ATT&CK technique T1059.001 for command and scripting interpreter usage, as well as T1070.004 for file deletion. Organizations should implement proper application sandboxing, conduct regular security assessments of pre-loaded applications, and ensure that all system services are properly secured with appropriate authorization checks. The incident highlights the critical need for maintaining secure coding practices in mobile device software development and the importance of proper security testing throughout the software development lifecycle.