CVE-2022-30748 in Members
Summary
by MITRE • 06/07/2022
Unprotected dynamic receiver in Samsung Members prior to version 4.2.005 allows attacker to launch arbitrary activity.
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Analysis
by VulDB Data Team • 06/10/2022
The vulnerability identified as CVE-2022-30748 represents a critical security flaw in Samsung Members application prior to version 4.2.005, where the software fails to properly protect dynamic receivers from unauthorized access. This issue stems from the application's improper handling of broadcast receivers that are registered at runtime, creating an attack surface that malicious actors can exploit to execute arbitrary activities within the application context. The flaw specifically affects the dynamic receiver registration mechanism, which should typically be secured with proper intent filtering and access controls to prevent unauthorized components from triggering these receivers. This vulnerability falls under the category of improper access control as defined by CWE-284, where the application fails to enforce proper authorization checks on dynamic components. The Samsung Members application serves as a gateway for various user services and functionalities, making it a prime target for attackers seeking to escalate privileges or gain unauthorized access to system resources. Attackers can leverage this vulnerability to launch arbitrary activities by sending specially crafted broadcasts that target the unprotected dynamic receivers, potentially leading to unauthorized data access, privilege escalation, or even system compromise. The operational impact extends beyond simple unauthorized activity execution, as this vulnerability could enable attackers to manipulate the application's behavior and potentially access sensitive user data or system functionalities. The flaw demonstrates a fundamental weakness in Android application security practices where dynamic components are not adequately protected against unauthorized invocation, aligning with ATT&CK technique T1059.001 for executing malicious code through application components and T1068 for local privilege escalation.
The technical implementation of this vulnerability involves the application's dynamic receiver registration without proper security constraints, allowing any application with appropriate permissions to send broadcasts that trigger these receivers. The vulnerability occurs when the application registers receivers programmatically without implementing proper intent filters or security checks that would normally prevent unauthorized access. This creates a scenario where malicious applications can construct and send broadcasts that match the dynamic receiver's intent filter, effectively bypassing normal application security boundaries. The lack of proper protection mechanisms means that these receivers can be invoked by any component with the necessary permissions, regardless of whether they should have access to such functionality. The vulnerability's exploitation requires minimal privileges and can be executed remotely, making it particularly dangerous in environments where users may unknowingly install malicious applications. The flaw represents a classic case of insufficient input validation and access control enforcement, where the application assumes that only legitimate components can trigger its dynamic receivers. This vulnerability directly impacts the principle of least privilege and demonstrates how dynamic registration of application components can create security holes when proper access controls are not implemented. The attack vector primarily involves sending malicious broadcasts through the Android Intent system, leveraging the unprotected dynamic receiver to execute arbitrary code or launch unauthorized activities within the application context.
Mitigation strategies for CVE-2022-30748 require immediate implementation of proper access controls and intent filtering for all dynamic receivers within the Samsung Members application. The recommended approach includes enforcing strict permission checks on dynamic receiver registration, implementing proper intent filtering that limits which components can trigger these receivers, and ensuring that all dynamic components are properly secured against unauthorized access. Organizations should upgrade to Samsung Members version 4.2.005 or later, which includes patches addressing this vulnerability. Security measures should also include monitoring for unauthorized broadcast activity and implementing proper application sandboxing to limit the potential impact of such vulnerabilities. The mitigation process involves reviewing all dynamic receiver implementations within the application and applying appropriate security controls such as signature verification, permission-based access control, and intent validation. Additionally, developers should implement proper logging and monitoring of receiver invocations to detect potential exploitation attempts. The fix should align with Android security best practices and industry standards such as those outlined in the OWASP Mobile Top 10, particularly focusing on proper input validation and access control mechanisms. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other dynamic components within the application ecosystem. The remediation process must also consider the broader security implications for the entire Samsung Members platform, ensuring that similar vulnerabilities are not present in other components or services that may be susceptible to similar attack vectors.