CVE-2024-43762 - Logic Error Leads to Service Unbinding Bypass, Potentially Causing Local Privilege Escalation

A newly discovered vulnerability, dubbed CVE-2024-43762, has been found to affect multiple locations within a system. This vulnerability stems from a logic error within the code, which can potentially allow the unbinding of a service within the system to be bypassed. As a result, this could lead to local escalation of privilege with no additional execution privileges needed. Importantly, user interaction is not required for exploitation, increasing the risk of this vulnerability being utilized by malicious actors. In this post, we will delve into the specifics of CVE-2024-43762, discussing code snippets, providing links to original references, and exploring the details of the exploit.

Code Snippet

The following code snippet showcases the logic error that resulted in the creation of the CVE-2024-43762 vulnerability:

void unbindService() {
    if (isBound) {
        isBound = false;
        // Logic error in this line of code
        if (!isBound) {
            // Unbind service
        } else {
            // Service still bound
        }
    } else {
        // Service not bound
    }
}

Here, the unbindService() function checks if a service is bound by examining the isBound boolean flag. If the flag is true, the system sets it to false, meaning that from this point on, the service should no longer be considered bound. However, the code then contains a logic error where it checks if (!isBound) immediately after setting it to false. This renders the else block unreachable, keeping the service bound despite logic suggesting it should be unbound.

Exploit Details

In multiple locations within the system, the aforementioned logic error can be leveraged by malicious actors. An attacker could exploit this vulnerability to perform a local escalation of privilege without needing any additional execution privileges, essentially elevating their permission level within the target system. This could lead to unauthorized access or control over sensitive information and system functionality. The affected systems do not require any user interaction for the vulnerability to be exploited. This significantly adds to the potential severity of the vulnerability, as attackers can compromise an affected system without needing the cooperation of a user.

Original References

This vulnerability and the associated CVE (CVE-2024-43762) are detailed in several original references, including those linked below:

1. CVE Official Listing
2. National Vulnerability Database (NVD) Listing
3. Vulnerability Research Announcement

Conclusion

CVE-2024-43762 is a concerning vulnerability due to its potential impact on the affected systems, the ease with which it can be exploited, and the lack of user interaction required for exploitation. Developers of the affected software should take immediate steps to rectify the logic error in their code, ensuring that all services are indeed unbound when appropriate. Additionally, individuals and organizations utilizing the affected system should apply patches as they become available to mitigate the risk of this vulnerability being leveraged by malicious actors.

Timeline

Published on: 01/03/2025 01:15:07 UTC
Last modified on: 01/03/2025 22:15:07 UTC