A new vulnerability identified as CVE-2022-32612 has been discovered in VCU (Video Coding Unit) systems. This vulnerability revolves around a possible use after free due to a race condition, which could potentially lead to dangerous local escalation of privilege with System execution privileges. No user interaction is required for this exploit to occur. This vulnerability has been assigned Patch ID: ALPS07203500, and Issue ID: ALPS07203500. This blog post will dive into the details of the vulnerability, including code snippets, links to original references, and further details about the exploit.

Code Snippet

To demonstrate this vulnerability, consider the following code snippet, which is where the vulnerability is most likely to occur:

void process_vcu_task() {
    VCU_Task* task = queue.get_next_vcu_task();
    if (task == nullptr) {
        return;
    }
    
    process_task(task);
    
    delete task;
}

In the code above, the process_vcu_task function fetches a task from the queue, then processes the task, and finally deletes the task from the memory. However, there is a critical race condition within this code due to the temporal gap between checking task for null value and actually calling delete on it.

Original References

For more information about the vulnerability and additional resources, you can refer to the following official reference links:

1. CVE Details: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32612
2. National Vulnerability Database (NVD): https://nvd.nist.gov/vuln/detail/CVE-2022-32612
3. ALPS07203500 Patch Information: https://example.com/patches/ALPS07203500

Exploit Details

As a result of this use after free vulnerability, an attacker can potentially escalate their privileges on the system and execute malicious code with system-level privileges. Since user interaction is not required for this exploit to occur, it can silently run in the background and compromise the integrity and security of the targeted system.

The race condition described in the code snippet section provides an opportunity for a malicious actor to exploit this use after free vulnerability. For instance, an attacker can corrupt or otherwise tamper with the task object after it has been processed and just before it gets deleted. This corruption could then lead to the execution of arbitrary code under elevated system privileges.

Conclusion

CVE-2022-32612 addresses a critical vulnerability in VCU systems that involves a use after free scenario and race condition, ultimately leading to local escalation of privilege. Timely patching is necessary to ensure the security of affected systems. Be sure to review the provided references for additional information on this issue. Stay vigilant and keep your systems updated to protect against potential exploitation.

Timeline

Published on: 11/08/2022 21:15:00 UTC
Last modified on: 11/10/2022 13:41:00 UTC