CVE-2025-26445 in Android
Summary
by MITRE • 09/04/2025
In offerNetwork of ConnectivityService.java, there is a possible leak of sensitive data due to a missing permission check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 09/04/2025
The vulnerability identified as CVE-2025-26445 resides within the ConnectivityService.java component of a mobile operating system's connectivity management framework. This flaw manifests as a missing permission check in the offerNetwork method, which represents a critical security oversight in the system's access control mechanisms. The vulnerability falls under the category of information disclosure, where sensitive data may be exposed to unauthorized components within the system. The absence of proper permission validation creates an attack surface that allows malicious applications or processes to access network-related information that should otherwise be restricted. This particular vulnerability is classified as a privilege escalation issue since it enables local information disclosure without requiring additional execution privileges or user interaction, making it particularly concerning from a security standpoint.
The technical implementation flaw occurs at the method level within the ConnectivityService class where the offerNetwork function fails to verify whether the calling process possesses the necessary permissions to access or manipulate network connectivity information. This missing permission check creates a direct pathway for information leakage, as any application with access to the ConnectivityService interface can potentially retrieve sensitive network data. The vulnerability operates at the system level where network connectivity parameters, connection states, and potentially network configuration details become accessible to unauthorized processes. The flaw is consistent with common security misconfigurations found in Android's permission model, where critical system services fail to validate caller credentials before exposing sensitive data. According to CWE guidelines, this represents a CWE-284: Improper Access Control, specifically manifesting as a lack of proper permission verification in system-level services. The vulnerability aligns with ATT&CK technique T1068: Exploitation for Privilege Escalation, where attackers can leverage missing access controls to gain unauthorized access to system resources.
The operational impact of CVE-2025-26445 extends beyond simple data exposure, as it enables attackers to gather comprehensive information about network connectivity and system configuration. This sensitive data could include network interface details, connection status information, and potentially authentication credentials or network parameters that could be leveraged for further attacks. The vulnerability is particularly dangerous because it requires no user interaction or additional privileges to exploit, making it highly accessible to malicious actors. Local information disclosure attacks of this nature can facilitate more sophisticated attacks such as network reconnaissance, where attackers can map network topology and identify potential targets for lateral movement. The impact is amplified in enterprise environments where network connectivity information may reveal internal network structures and security configurations that could be used to plan more targeted attacks. The vulnerability affects the integrity of the system's access control model and could potentially enable attackers to gather intelligence about network security measures and configurations.
Mitigation strategies for CVE-2025-26445 should focus on implementing proper permission validation within the ConnectivityService component. The primary fix involves adding comprehensive permission checks in the offerNetwork method to ensure that only authorized processes can access network connectivity information. This remediation should follow established security practices such as the principle of least privilege, where processes are granted only the minimum permissions necessary to perform their functions. System administrators should ensure that all network-related services properly validate caller credentials before exposing sensitive information. The fix should include robust permission verification mechanisms that align with Android's security model and permission architecture. Additionally, regular security audits should be conducted to identify similar permission gaps in other system services, as this vulnerability represents a pattern of missing access controls that could exist elsewhere in the operating system. Organizations should also implement monitoring solutions to detect unauthorized access attempts to connectivity services and maintain up-to-date security patches to prevent exploitation of this vulnerability. The remediation approach should include comprehensive testing to ensure that permission checks do not negatively impact legitimate system functionality while providing adequate protection against unauthorized information disclosure.