CVE-2024-32905 in Android
Summary
by MITRE • 06/14/2024
In circ_read of link_device_memory_legacy.c, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote code execution 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-2024-32905 resides within the circ_read function of link_device_memory_legacy.c, representing a critical out-of-bounds write flaw that can be exploited to achieve remote code execution. This issue stems from an inadequate bounds checking mechanism that fails to properly validate input data boundaries before writing to memory locations. The flaw exists in the kernel-level memory management subsystem, specifically within legacy device memory handling code that manages circular buffer operations for link device communication channels. The absence of proper boundary validation allows malicious actors to craft inputs that exceed allocated buffer limits, potentially corrupting adjacent memory regions and enabling arbitrary code execution.
The technical implementation of this vulnerability demonstrates a classic buffer overflow condition where the circ_read function processes data from link devices without sufficient validation of buffer limits. The improper bounds check creates a scenario where an attacker can manipulate input parameters to cause writes beyond the intended memory allocation, leading to memory corruption that can be leveraged for privilege escalation. This type of vulnerability falls under CWE-129, which specifically addresses insufficient validation of length of input buffers, and represents a direct pathway to remote code execution as no additional privileges are required for exploitation. The flaw operates at the kernel level, making it particularly dangerous as successful exploitation can compromise the entire system kernel and potentially provide attackers with full system control.
The operational impact of CVE-2024-32905 extends beyond simple memory corruption, as it enables remote code execution without user interaction, making it particularly attractive to threat actors seeking automated exploitation. The vulnerability affects systems that utilize legacy link device memory handling mechanisms, potentially impacting a wide range of embedded systems, network equipment, and IoT devices that rely on such kernel components. Attackers can exploit this vulnerability through network-based attacks targeting the affected kernel modules, eliminating the need for physical access or local user privileges. This characteristic aligns with ATT&CK technique T1059.001 for command and scripting interpreter, where the successful exploitation allows for arbitrary code execution and subsequent lateral movement within compromised networks. The vulnerability's remote exploitability without user interaction places it in the high-risk category for enterprise environments and critical infrastructure systems.
Mitigation strategies for CVE-2024-32905 should prioritize immediate patch deployment from vendors, as the vulnerability's severity and exploitability make prompt remediation essential. System administrators should implement network segmentation and monitoring to detect potential exploitation attempts targeting the affected kernel components. The fix typically involves correcting the bounds checking logic in the circ_read function to properly validate input parameters against allocated buffer sizes before any memory write operations occur. Additional defensive measures include kernel module hardening, enabling kernel address space layout randomization, and implementing robust input validation at multiple layers of the system architecture. Organizations should also consider implementing intrusion detection systems to monitor for anomalous behavior patterns that may indicate exploitation attempts, particularly focusing on memory corruption indicators and unusual kernel module activity. Regular security assessments of kernel components and device drivers should be conducted to identify similar vulnerabilities in legacy code sections that may present similar attack surfaces.