CVE-2024-0108 - NVIDIA Jetson Linux NvGPU MMU Mapping Vulnerability: Exploit Details, References, and Code Snippet

A new vulnerability, tagged as CVE-2024-0108, has been discovered in NVIDIA Jetson Linux, specifically in the NvGPU component. This vulnerability could lead to various issues such as denial of service, code execution, and even escalation of privileges. In light of this new development, it is crucial for developers and security professionals to understand the ins and outs of this vulnerability and take the necessary steps to ensure the security of their systems.

In this long-read post, we will delve into the details of the CVE-2024-0108 vulnerability, provide a code snippet demonstrating the issue, and offer the original references as well as possible mitigation strategies.

Vulnerability Details

The source of the CVE-2024-0108 vulnerability lies in the error-handling paths within the GPU MMU (Memory Management Unit) mapping code, specifically the NvGPU component of NVIDIA Jetson Linux. During a GPU MMU mapping attempt, if the operation fails, the error-handling paths do not properly clean up the failed mapping attempt. The failure to properly clean up may leave the system exposed to malicious exploitation, including denial of service, code execution, and escalation of privileges.

Exploit Details

As of now, there's no known exploit targeting this vulnerability in the wild. However, cybercriminals may look into furnishing and exploiting a custom proof of concept (PoC) to compromise vulnerable systems. Therefore, it's critical to stay vigilant and promptly apply security patches for CVE-2024-0108 once released by NVIDIA.

Code Snippet

Here's a hypothetical demonstration of the code snippet indicating the CVE-2024-0108 vulnerability in NVIDIA Jetson Linux's NvGPU component:

/* Simplified NvGPU MMU mapping implementation */
int map_gpu_memory(struct nv_gpu *gpu, void *addr, size_t size) {
    int ret = ;

    /* Allocate GPU mapping */
    ret = allocate_gpu_map(gpu, addr, size);
    if (ret) {
        goto err_alloc;
    }

    /* Do MMU mapping */
    ret = mmu_map(gpu, addr, size);
    if (ret) {
        goto err_mmu_map; // <- Error handling path fails to clean up
    }

    return ;

err_mmu_map:
    /* Failed MMU mapping */
err_alloc:
    /* Failed to allocate GPU mapping */
    return ret;
}

From the code snippet above, we can see that if the mmu_map function fails, the error handling path does not clean up the mappings allocated earlier. This issue opens up the possibility for an attacker to exploit the vulnerability, compromising the system security.

NVIDIA Security Bulletin: [link to NVIDIA's official security bulletin once published]

2. CVE-2024-0108 National Vulnerability Database (NVD) Entry: https://nvd.nist.gov/vuln/detail/CVE-2024-0108
3. NVIDIA Jetson Linux Developer Guide: https://docs.nvidia.com/jetson/l4t/index.html

Mitigation

As we wait for NVIDIA to release security patches addressing this vulnerability, users can take the following steps to reduce the risks associated with CVE-2024-0108:

1. Restrict access to systems running NVIDIA Jetson Linux, ensuring only trusted users and administrators have access.

Monitor and assess the GPU activity continuously for any irregularities or signs of exploitation.

3. Apply the security update from NVIDIA as soon as it becomes available, following their guidelines to minimize any potential disruption to the system.

Conclusion

Understanding the details and implications of the CVE-2024-0108 vulnerability is crucial for developers and security professionals to protect the security and integrity of their systems. By being aware of the exploit details, perusing original references, and applying the provided code snippet, developers can gain valuable insights to help address the vulnerability and protect their NVIDIA Jetson Linux-based systems.

Always prioritize the security of your systems and stay vigilant against new vulnerabilities and potential exploits.

Timeline

Published on: 08/08/2024 17:15:18 UTC
Last modified on: 08/08/2024 18:55:19 UTC