CVE-2024-27219 in Android
Summary
by MITRE • 03/11/2024
In tmu_set_pi of tmu.c, there is a possible out of bounds write due to a missing bounds check. 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 • 08/15/2024
The vulnerability identified as CVE-2024-27219 resides within the tmu_set_pi function in the tmu.c source file, representing a critical out-of-bounds write flaw that fundamentally compromises system integrity. This issue manifests as a missing bounds check during parameter processing, creating an exploitable condition where malicious code can write data beyond the allocated memory boundaries of the target buffer. The vulnerability operates at the kernel level within a time management unit component, suggesting its potential impact extends across system stability and privilege escalation capabilities.
The technical implementation of this flaw demonstrates a classic buffer overflow condition where the tmu_set_pi function fails to validate input parameters against predefined memory limits before performing write operations. This absence of bounds validation creates a scenario where an attacker can manipulate the function's parameters to overwrite adjacent memory locations, potentially corrupting critical system data structures or executable code. The vulnerability's classification as local privilege escalation indicates that exploitation does not require elevated privileges initially, as the flaw exists within a kernel module that typically operates with high system privileges, allowing an attacker to leverage the vulnerability to gain root-level access.
The operational impact of CVE-2024-27219 extends beyond simple memory corruption, as it enables unauthorized privilege elevation without user interaction requirements, making it particularly dangerous in environments where kernel modules are actively utilized. This characteristic aligns with ATT&CK technique T1068, which covers privilege escalation through local exploits, and represents a direct threat to system integrity and confidentiality. The vulnerability's nature suggests potential exploitation through kernel memory manipulation, possibly leading to complete system compromise where attackers can execute arbitrary code with the highest privileges available to the kernel.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected systems, as the absence of user interaction requirements makes it highly exploitable in automated attack scenarios. System administrators must implement comprehensive monitoring for suspicious kernel-level activities and ensure all kernel modules are regularly updated to address known vulnerabilities. The flaw's presence in a time management unit component suggests that organizations should also review their kernel configuration and implement proper access controls to limit potential exploitation vectors. Additionally, implementing kernel address space layout randomization and other exploit mitigation techniques can help reduce the effectiveness of potential exploitation attempts. This vulnerability demonstrates the critical importance of rigorous input validation and bounds checking in kernel-level code, as highlighted by CWE-129, which addresses insufficient bounds checking in software development practices.