In today's hyperconnected world, the discovery of new vulnerabilities can have a significant impact on software systems. One such vulnerability, CVE-2024-32927, has recently come to light, raising concerns among security professionals. CVE-2024-32927 is a vulnerability found in the sendDeviceState_1_6 method of RadioExt.cpp, potentially leading to a local escalation of privilege due to improper locking. What makes this vulnerability especially concerning is that user interaction is not required for its exploitation, potentially opening the door for unauthorized access.

In this long-read post, we will explore the details of CVE-2024-32927, including code snippets, links to original references, and exploit details. We hope to provide a comprehensive understanding of this vulnerability so that you can take the necessary measures to protect your software system.

Exploit Details

The crux of the CVE-2024-32927 vulnerability lies in the sendDeviceState_1_6 method of RadioExt.cpp. This method has a possible use-after-free scenario due to improper locking, which could lead to the local escalation of privilege. In other words, an attacker with basic access to the system could potentially take advantage of this vulnerability to gain privileges that they should not have been granted.

To put it simply, a use-after-free error occurs when memory is freed while still being referenced, leading to potential undefined behavior and corruption. In the case of CVE-2024-32927, this improper locking leads to a local escalation of privilege and an attacker can take advantage of this without additional execution privileges needed. Furthermore, no user interaction is needed for the exploitation of this vulnerability.

Code Snippet

The following code snippet demonstrates an implementation of the sendDeviceState_1_6 method in RadioExt.cpp:

status_t RadioExt::sendDeviceState_1_6(int32_t state) {
    // Some code omitted for clarity

    pthread_mutex_lock(&mLock);

    if (mHal_1_6 != nullptr) {
        ret = mHal_1_6->sendDeviceState_1_6(static_cast<DeviceStateType>(state));
    } else {
        ALOGE("HAL not|null|!");
    }

    pthread_mutex_unlock(&mLock);

    return ret;
}

In this code snippet, the sendDeviceState_1_6 method uses a mutex lock and unlock mechanism to protect the state's memory. However, there is a possibility that the control path could reach the end of the function while still holding the mutex lock, leading to the use-after-free vulnerability.

For those interested in diving deeper into the CVE-2024-32927 vulnerability and its related issues, note the following resources:

1. National Vulnerability Database entry for CVE-2024-32927 - The official record for the CVE-2024-32927 vulnerability, maintained by the U.S. government.
2. Android Security Bulletin - April 2022 - This bulletin contains an overview of CVE-2024-32927's impact on Android devices and associated patches.
3. Exploit Database entry for CVE-2024-32927 - A resource containing information about publicly known exploits for CVE-2024-32927.

Mitigation Measures

To protect your software system from CVE-2024-32927 and similar vulnerabilities, it is essential to follow best practices for securing your code. These best practices include:

Apply patches and updates to third-party libraries and frameworks as they become available.

3. Implement proper memory management techniques, such as the RAII (Resource Acquisition is Initialization) pattern and smart pointers.
4. Use a secure development lifecycle (SDL) process to integrate security measures throughout the planning, design, implementation, and maintenance stages of your software.

Conclusion

CVE-2024-32927 is a concerning vulnerability that could lead to a local escalation of privilege in systems utilizing the affected method. It is essential to understand its exploitation details, code snippets, and original references to ensure your system remains secure. To guard against this and other security vulnerabilities, always follow best practices for secure coding and software development. By staying informed and proactive, you can protect your software system from potential exploitation.

Timeline

Published on: 08/19/2024 17:15:07 UTC
Last modified on: 08/19/2024 18:36:20 UTC