CVE-2024-47027 in Android
Summary
by MITRE • 10/25/2024
In sm_mem_compat_get_vmm_obj of lib/sm/shared_mem.c, there is a possible arbitrary physical memory access due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 10/25/2024
The vulnerability identified as CVE-2024-47027 resides within the shared memory management component of a system's software library, specifically in the sm_mem_compat_get_vmm_obj function located in lib/sm/shared_mem.c. This flaw represents a critical security weakness that stems from inadequate input validation mechanisms, allowing for potentially unauthorized access to physical memory regions. The vulnerability is classified under CWE-125 as an out-of-bounds read, though its implications extend far beyond simple memory access violations. The function's failure to properly validate memory access parameters creates a pathway for malicious actors to manipulate virtual memory mappings and potentially access sensitive physical memory locations that should remain protected.
The technical implementation of this vulnerability allows for local privilege escalation without requiring any additional execution privileges or user interaction, making it particularly dangerous in environments where local users have access to the system. When the sm_mem_compat_get_vmm_obj function processes memory access requests, it fails to validate the boundaries of memory regions being accessed, enabling an attacker to craft malicious input that bypasses normal memory protection mechanisms. This flaw operates at a low level within the memory management subsystem, where virtual to physical memory address translation occurs, potentially allowing attackers to map arbitrary physical memory addresses into their process space. The vulnerability's exploitation does not require user interaction because it leverages existing system functionality that can be manipulated through controlled input parameters.
The operational impact of CVE-2024-47027 extends significantly beyond typical memory access violations, as it provides a direct pathway for local users to escalate their privileges to the highest system level. This privilege escalation capability means that an attacker with minimal system access could potentially gain root or administrator privileges, allowing them to execute arbitrary code, modify system files, and access sensitive data. The vulnerability's presence in a shared memory management component suggests that it could affect multiple applications or system services that rely on this memory management functionality. The lack of user interaction requirement makes this vulnerability particularly concerning for environments where untrusted users might have local access, such as multi-tenant systems, development environments, or shared computing platforms where security boundaries are not strictly enforced.
Mitigation strategies for CVE-2024-47027 should focus on implementing robust input validation mechanisms within the sm_mem_compat_get_vmm_obj function and related memory management components. System administrators should prioritize applying vendor patches or updates that address the specific input validation deficiencies in the shared memory management library. Additionally, implementing memory protection mechanisms such as address space layout randomization and kernel address space layout randomization can help reduce the effectiveness of exploitation attempts. The vulnerability's classification aligns with ATT&CK technique T1068 which covers local privilege escalation, and organizations should consider implementing monitoring for suspicious memory access patterns that could indicate exploitation attempts. Network segmentation and least privilege principles should also be enforced to limit the potential impact of successful exploitation, while regular security audits of memory management components can help identify similar vulnerabilities in other system components.