Privileged Attacker Can Execute Arbitrary Code via Heap Overflow in Little Kernel Bootloader Prior to SMR Mar-2024 Release 1

What is CVE-2024-20832?

CVE-2024-20832 is a critical vulnerability identified in the Little Kernel Bootloader developed by Samsung. This bootloader is essential for initializing hardware and loading the operating system on various devices. The vulnerability arises from a heap overflow, which can be exploited by local privileged attackers to execute arbitrary code within the affected system. This creates a significant risk for organizations, as it can lead to unauthorized access and control over system functions, potentially compromising sensitive information and critical operations.

Technical Details

The vulnerability is classified as a heap overflow, which occurs when a program writes more data to a heap memory block than it was allocated. This can corrupt adjacent memory, leading to erratic program behavior or allowing an attacker to execute arbitrary code. Specifically, in the context of the Little Kernel Bootloader, this heap overflow can be exploited by users with local privileged access. The vulnerability affects versions of Little Kernel released prior to the SMR Mar-2024 Release 1, necessitating that organizations update their systems to this version or later to eliminate the risk of exploitation.

Impact of the Vulnerability

1. Unauthorized Code Execution: The primary impact of CVE-2024-20832 is the potential for local privileged attackers to execute arbitrary code. This unintended execution can lead to various malicious activities, including the installation of malware or unauthorized access to system resources.

2. System Compromise: Due to the nature of the vulnerability, an attacker could compromise the integrity and confidentiality of an affected system. This can enable them to manipulate system functions, access sensitive data, or use the compromised system for further attacks against other networked devices.

3. Risk of Escalation and Lateral Movement: If attackers are able to execute arbitrary code, they may escalate their privileges and gain deeper access to the system environment. This could facilitate lateral movement within an organization’s network, increasing the potential for widespread impact and data breaches.

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