CVE-2024-27225 in Android
Summary
by MITRE • 03/11/2024
In sendHciCommand of bluetooth_hci.cc, there is a possible out of bounds read due to a heap buffer overflow. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 11/07/2024
The vulnerability identified as CVE-2024-27225 represents a critical heap buffer overflow flaw within the bluetooth_hci.cc component of a system's bluetooth subsystem. This issue manifests as an out of bounds read condition that occurs during the execution of the sendHciCommand function, which is responsible for handling bluetooth host controller interface commands. The vulnerability resides in the improper handling of memory buffers when processing bluetooth communication protocols, creating a scenario where arbitrary memory reads can occur beyond the allocated buffer boundaries. The flaw specifically affects the heap memory management within the bluetooth subsystem, where insufficient bounds checking allows malicious data to trigger memory access violations that could potentially expose sensitive information stored in adjacent memory regions.
The technical exploitation of this vulnerability requires system execution privileges, indicating that an attacker must already have elevated access to the target system to leverage this flaw effectively. However, the absence of user interaction requirements makes this vulnerability particularly concerning as it can be exploited automatically without requiring any human intervention or social engineering tactics. The heap buffer overflow condition creates opportunities for information disclosure attacks where adjacent memory segments containing sensitive data such as cryptographic keys, authentication tokens, or system credentials could be read and extracted by an attacker. This type of vulnerability falls under the CWE-121 heap-based buffer overflow category, which is classified as a memory safety error that can lead to various security consequences including information disclosure, privilege escalation, or system instability.
From an operational perspective, this vulnerability poses significant risks to systems that rely on bluetooth connectivity for device management, data transfer, or communication protocols. The impact extends beyond simple information disclosure as the heap corruption can potentially lead to more severe consequences including system crashes, denial of service conditions, or even privilege escalation if the memory corruption affects critical system structures. The vulnerability affects systems where bluetooth hardware interfaces are actively used, particularly in environments where bluetooth protocols are employed for device pairing, data synchronization, or wireless communication. Security analysts should consider this vulnerability in the context of the attack chain framework, where it may serve as a stepping stone for more sophisticated attacks. The ATT&CK framework would categorize this as a memory corruption vulnerability that could be leveraged for privilege escalation or information gathering activities within a compromised system environment.
The mitigation strategies for CVE-2024-27225 should prioritize immediate patch deployment from the vendor to address the heap buffer overflow condition in the bluetooth_hci.cc module. System administrators should implement comprehensive monitoring for unusual bluetooth communication patterns or memory access violations that could indicate exploitation attempts. Additional protective measures include implementing memory protection mechanisms such as stack canaries, address space layout randomization, and heap integrity checks to detect and prevent exploitation attempts. Organizations should also consider restricting bluetooth functionality to only essential services and implementing network segmentation to limit the potential impact of successful exploitation. Regular security assessments of bluetooth subsystems should be conducted to identify similar memory safety issues, and code reviews should specifically focus on buffer handling mechanisms within system-level communication components. The vulnerability highlights the importance of rigorous memory safety practices in system-level code development, particularly for components that handle untrusted input from hardware interfaces.