CVE-2024-32893 in Android
Summary
by MITRE • 06/14/2024
In _s5e9865_mif_set_rate of exynos_dvfs.c, there is a possible out of bounds read due to improper casting. 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 • 07/11/2024
The vulnerability identified as CVE-2024-32893 resides within the exynos_dvfs.c source file, specifically in the _s5e9865_mif_set_rate function where a potential out of bounds read condition has been discovered. This flaw represents a critical security weakness that stems from improper casting operations within the device driver code responsible for managing dynamic voltage and frequency scaling on exynos SoC platforms. The issue manifests when the driver processes rate setting operations for memory interfaces, creating an opportunity for unauthorized data access through memory read operations that extend beyond allocated buffer boundaries.
The technical root cause of this vulnerability aligns with CWE-129, which describes improper validation of array indices, and CWE-704, which covers incorrect type casting operations. When the function processes memory interface rate configurations, it fails to properly validate input parameters before performing casting operations that subsequently lead to memory access violations. The improper casting allows malicious actors to manipulate memory access patterns through crafted input parameters, potentially enabling them to read sensitive data from adjacent memory locations. This particular flaw operates at the kernel level within the device driver subsystem, making it particularly dangerous as it can be exploited without requiring elevated privileges or user interaction.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to extract potentially sensitive data from kernel memory spaces. An attacker could leverage this out of bounds read to access confidential information such as cryptographic keys, system configuration parameters, or other sensitive data stored in memory regions adjacent to the vulnerable buffer. The lack of requirement for user interaction makes this vulnerability particularly concerning as it can be exploited automatically by malicious code running in the same security context as the vulnerable driver. This type of vulnerability is categorized under the ATT&CK technique T1059.001 for command and scripting interpreter, and T1068 for exploit for privilege escalation, as it represents a foundational weakness that could enable further exploitation.
Mitigation strategies for CVE-2024-32893 should focus on implementing proper input validation and boundary checking mechanisms within the affected driver function. The most effective approach involves adding comprehensive validation of all input parameters before any casting operations occur, ensuring that array indices and memory access operations remain within defined bounds. Additionally, developers should implement proper type safety checks and utilize compiler flags that enable bounds checking and static analysis tools to identify similar patterns in other driver components. System administrators should ensure that affected devices receive timely kernel updates and patches that address the specific casting and boundary validation issues within the exynos_dvfs.c module. The vulnerability demonstrates the importance of rigorous code review processes and adherence to secure coding practices, particularly when dealing with low-level kernel drivers that handle critical system resources and memory management operations.