CVE-2020-0328 in Android
Summary
by MITRE
In the camera, there is a possible out of bounds read due to an integer overflow. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-150156131
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Analysis
by VulDB Data Team • 09/18/2020
The vulnerability identified as CVE-2020-0328 represents a critical security flaw within the Android camera subsystem that manifests as an out-of-bounds read condition stemming from integer overflow. This issue resides in the camera service component of Android 11 operating systems and affects devices with the specific Android ID A-150156131. The flaw occurs when the system processes camera-related data structures where integer overflow conditions can cause memory access violations that extend beyond allocated buffer boundaries. Such vulnerabilities typically arise from insufficient input validation and improper handling of numeric values that exceed their intended storage capacity, creating opportunities for memory corruption that can be exploited by malicious actors.
The technical implementation of this vulnerability involves the camera service's handling of buffer sizes and memory allocation parameters where integer overflow conditions can occur during calculations involving image data processing or metadata handling. When integer overflow happens within these calculations, the resulting values can cause buffer over-read scenarios where the system attempts to access memory locations beyond the intended buffer boundaries. This specific flaw requires system execution privileges to exploit successfully, indicating that it operates at a privileged level within the Android security model. The vulnerability does not require user interaction for exploitation, making it particularly dangerous as it can be triggered automatically through system-level processes or malicious applications that can elevate privileges.
The operational impact of CVE-2020-0328 extends beyond simple information disclosure to potentially enable more severe security consequences. Local information disclosure through this vulnerability could expose sensitive camera-related data including metadata, image processing parameters, or system memory contents that may contain confidential information. The integer overflow condition creates a memory corruption scenario that could potentially be leveraged to achieve privilege escalation or system instability. According to CWE classification, this vulnerability maps to CWE-128 Integer Underflow or Overflow, which represents a well-documented category of flaws where integer arithmetic operations produce values that fall outside the range of the data type. The ATT&CK framework would categorize this under privilege escalation techniques, specifically targeting the camera service as a potential attack vector for system-level compromise.
Mitigation strategies for CVE-2020-0328 should focus on implementing robust input validation and boundary checking mechanisms within the camera service components. The Android security team addressed this issue through system updates that include enhanced integer overflow protection and improved buffer management in camera subsystems. Organizations should ensure immediate deployment of Android 11 security patches and maintain comprehensive monitoring of camera service operations for anomalous behavior. The vulnerability highlights the importance of proper integer arithmetic handling in security-critical components and underscores the need for thorough code review processes that specifically target buffer overflow conditions. Additionally, implementing memory safety features such as stack canaries, address space layout randomization, and heap metadata protection can provide additional defense-in-depth measures against similar vulnerabilities. Regular security assessments of camera and multimedia services should be conducted to identify potential integer overflow conditions that could lead to similar out-of-bounds read scenarios.