CVE-2023-28576 Explained : Impact and Mitigation

This article discusses the details of CVE-2023-28576, including what it is, its impact, technical details, and mitigation strategies.

Understanding CVE-2023-28576

CVE-2023-28576 refers to a Time-of-check Time-of-use (TOCTOU) Race Condition found in the Camera Kernel Driver. This vulnerability may allow user mode to race and modify the packet header, potentially leading to out-of-bounds read/write issues.

What is CVE-2023-28576?

The buffer obtained from kernel APIs such as cam_mem_get_cpu_buf() may become readable/writable in userspace after the kernel accesses it. This means that user mode can manipulate the packet header, causing checks in kernel code to become invalid and resulting in potential security risks.

The Impact of CVE-2023-28576

The impact of this vulnerability is rated as MEDIUM severity. With a CVSSv3.1 base score of 6.4, the vulnerability has a high impact on confidentiality, integrity, and availability. The attack complexity is considered high, and the attack vector is local.

Technical Details of CVE-2023-28576

This CVE affects multiple products under the Snapdragon platform by Qualcomm, Inc. The affected versions include FastConnect 6800, FastConnect 6900, QCS410, SD865 5G, Snapdragon XR2 5G Platform, and many others. The vulnerability arises from a race condition in the Camera Kernel Driver, potentially leading to out-of-bounds read/write issues.

Vulnerability Description

The vulnerability allows user mode to race and modify the packet header, leading to invalid checks in the kernel code and resulting in out-of-bounds read/write issues.

Affected Systems and Versions

Multiple products under the Snapdragon platform are affected, including FastConnect series, Snapdragon Mobile Platforms, Snapdragon Wearables, and various modem-RF systems and platforms.

Exploitation Mechanism

The vulnerability can be exploited by manipulating the buffer obtained from kernel APIs, making it readable/writable in userspace after kernel accesses it, leading to race conditions and potential security issues.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-28576, immediate steps can be taken to address the vulnerability and prevent potential exploitation.

Immediate Steps to Take

Apply patches and updates provided by Qualcomm to address the vulnerability.
Monitor for any suspicious activity related to the affected systems.
Implement security best practices to reduce the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch software and firmware to prevent known vulnerabilities.
Conduct security assessments and audits to identify and address potential risks.
Train staff on security protocols and procedures to enhance overall security posture.

Patching and Updates

Qualcomm has released a security bulletin addressing the CVE-2023-28576 vulnerability. It is crucial for users to apply the recommended patches and updates provided by the vendor to protect their systems from potential exploitation.