CVE-2022-33695 in Smart Phone
Summary
by MITRE • 07/12/2022
Use of improper permission in InputManagerService prior to SMR Jul-2022 Release 1 allows unauthorized access to the service.
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Analysis
by VulDB Data Team • 07/22/2022
The vulnerability identified as CVE-2022-33695 represents a critical permission flaw within the InputManagerService component of Android operating systems. This issue affects devices running versions prior to the SMR Jul-2022 Release 1 security patch, creating a significant attack surface that could be exploited by malicious actors. The vulnerability stems from improper access controls that allow unauthorized applications or processes to gain access to the InputManagerService, which is responsible for managing input events and device interactions within the Android framework.
The technical flaw manifests through inadequate permission checking mechanisms within the InputManagerService implementation. Specifically, the service fails to properly validate the privileges of requesting processes before granting access to input handling functionalities. This weakness enables attackers to manipulate input events, potentially intercepting user interactions or injecting malicious input signals. The vulnerability operates at the system level, where the InputManagerService typically requires elevated privileges to function correctly, but the permission validation logic is insufficient to prevent unauthorized access. This misconfiguration creates a path for privilege escalation attacks where malicious applications can bypass normal security boundaries.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it could enable sophisticated attack vectors including keylogging, touch injection, and user interface manipulation. Attackers could exploit this flaw to capture sensitive user input such as passwords, PINs, or other confidential information entered through the device interface. The vulnerability also poses risks to device integrity and user privacy, as it allows for potential interception of input events that could be used for credential theft or surveillance purposes. Additionally, the flaw could facilitate more complex attacks such as session hijacking or the execution of malicious commands through manipulated input sequences.
Security researchers have classified this vulnerability under CWE-284, which addresses improper access control issues in software systems. The vulnerability aligns with ATT&CK technique T1068, which focuses on exploiting local privileges to gain unauthorized access to system resources. The risk assessment indicates that this vulnerability could be exploited by both local and remote attackers, depending on the specific implementation and device configuration. Organizations should prioritize patching affected systems to mitigate this risk, as the vulnerability affects the fundamental input handling mechanisms that are critical to device security and user interaction.
Mitigation strategies should include immediate deployment of the SMR Jul-2022 Release 1 security patches, which address the permission validation flaws in InputManagerService. System administrators should also implement additional monitoring of input service access patterns to detect potential exploitation attempts. Network segmentation and application whitelisting can provide additional defense layers, while regular security audits should verify that proper access controls are maintained. The vulnerability highlights the importance of maintaining up-to-date security patches and implementing robust privilege management systems to prevent unauthorized access to core system services.