In today's advanced technological landscape, security vulnerabilities in popular apps can put countless users and their data at risk. One such recently discovered vulnerability in the availableToWriteBytes function of MessageQueueBase.h (CVE-2024-31313) may lead to out-of-bounds write errors, leading to local escalation of privilege.

This long-read post will delve deeper into this vulnerability, discussing the code snippet responsible for the issue, links to original references, and details on how the exploit works. To maintain clarity and readability, we will use plain American English throughout the discussion.

Description of Vulnerability

The vulnerability, identified as CVE-2024-31313, resides in the availableToWriteBytes function of MessageQueueBase.h. In particular, an incorrect bounds check in the code can cause a possible out-of-bounds write error, facilitating local escalation of privilege.

Worth noting is that no additional execution privileges are required, and no user interaction is necessary for exploitation to occur. Consequently, the potential risk and impact on affected systems may be significant.

The code snippet in question is found in the availableToWriteBytes function of MessageQueueBase.h

size_t MessageQueueBase::availableToWriteBytes(size_t write_pos) const {
    size_t read_pos = mRead.load(std::memory_order_acquire);
    if (write_pos < read_pos) {
        return read_pos - write_pos - 1;
    }
    return read_pos + (mSize - write_pos) - 1;
}

The problematic part is the bounds check when comparing write_pos and read_pos. Due to an incorrect check, it may result in out-of-bounds write errors that may be exploited by malicious users.

Original References

To understand this vulnerability and learn about the details, it is crucial to refer to the original sources and documentation. The following are reliable links to the vulnerability's key references:

1. The official CVE report: CVE-2024-31313
2. The National Vulnerability Database (NVD) entry: NVD - CVE-2024-31313

Exploit Details

Now that we have seen the code snippet and original references, let's examine how exploitation might occur.

First, an attacker would actively search for a system or application utilizing MessageQueueBase.h that contains the incorrect bounds check discussed earlier. Since the availableToWriteBytes function is primarily concerned with determining the available buffer space, attackers may exploit this vulnerability by sending crafted data to the queue to trigger the out-of-bounds write error.

Once the error is triggered, the attacker can potentially overwrite crucial system data or inject arbitrary code, escalating their privileges in the local system and theoretically allowing them to control affected infrastructure. It is important to emphasize that neither additional execution privileges nor user interactions are necessary for this exploit to succeed.

Conclusion

The aforementioned vulnerability (CVE-2024-31313) in the availableToWriteBytes function of MessageQueueBase.h is a serious threat, as it enables potential attackers to escalate their privileges. Given the lack of additional execution privileges and user interaction requirements, developers must keep an eye out for patches and updates to secure their systems and applications against this exploit.

As always, it is essential for developers and system administrators to stay current with industry news, monitor vulnerability reports, and apply necessary security measures to ensure the safety of their systems and user data.

Timeline

Published on: 07/09/2024 21:15:12 UTC
Last modified on: 08/01/2024 13:50:49 UTC