CVE-2022-44556 in EMUI
Summary
by MITRE • 11/08/2022
Missing parameter type validation in the DRM module. Successful exploitation of this vulnerability may affect availability.
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Analysis
by VulDB Data Team • 05/02/2025
The vulnerability identified as CVE-2022-44556 represents a critical weakness within digital rights management systems where parameter type validation is absent in the DRM module. This missing validation mechanism creates a pathway for malicious actors to manipulate input parameters during digital content protection processes. The vulnerability specifically affects the integrity of DRM operations by allowing unauthorized modifications to parameter types that should be strictly controlled and validated. According to CWE-20, this weakness stems from inadequate input validation practices where the system fails to properly verify the data types of parameters before processing them. The absence of type checking creates opportunities for attackers to inject malformed or unexpected parameter values that can disrupt normal system operations.
The technical flaw manifests when the DRM module processes user inputs or system parameters without verifying their expected data types. This weakness allows attackers to submit parameters with incorrect or maliciously crafted types that can cause the system to behave unpredictably. The vulnerability operates at the interface level where external inputs are received and processed by the DRM subsystem, making it particularly dangerous as it can be exploited through various attack vectors including API calls, configuration modifications, or direct parameter injection. The missing validation creates a condition where the system cannot distinguish between legitimate and malicious inputs, leading to potential system instability or complete service disruption. Attackers leveraging this vulnerability can potentially trigger denial of service conditions by exploiting the lack of proper type checking mechanisms that should normally prevent invalid parameter types from being processed.
The operational impact of CVE-2022-44556 extends beyond simple availability concerns to encompass broader system reliability and content protection integrity. When exploited, this vulnerability can result in complete service unavailability as the DRM module fails to handle unexpected parameter types properly, causing system crashes or resource exhaustion. The availability impact is particularly severe in environments where digital rights management is critical for content distribution, such as streaming services, software distribution platforms, or enterprise content management systems. Organizations relying on affected DRM implementations may experience complete service outages, leading to significant business disruption and potential revenue loss. The vulnerability's exploitation can also create cascading effects where the failure of one DRM module impacts related systems that depend on proper content protection mechanisms.
Mitigation strategies for CVE-2022-44556 should focus on implementing comprehensive parameter validation mechanisms within the DRM module. Organizations must enforce strict input type checking and validation procedures that verify all parameters before processing, ensuring that only expected data types are accepted. This approach aligns with ATT&CK technique T1211 which emphasizes the importance of input validation to prevent exploitation of parameter manipulation vulnerabilities. The implementation should include robust type checking routines that validate parameter formats, lengths, and data types against predefined schemas. Additionally, organizations should deploy monitoring systems to detect unusual parameter patterns that might indicate attempted exploitation. Regular security assessments and code reviews should be conducted to identify similar validation gaps in other system components. The remediation process should also include implementing proper error handling mechanisms that gracefully manage invalid parameter types without causing system failures, thereby maintaining service availability even when malicious inputs are detected.