CVE-2024-53842 - Out of Bounds Write Vulnerability in cc_SendCcImsInfoIndMsg of cc_MmConManagement.c, Leading to Remote Code Execution

A new vulnerability, identified as CVE-2024-53842, has been discovered in the cc_SendCcImsInfoIndMsg function of the cc_MmConManagement.c file. This vulnerability can lead to an out-of-bounds write issue due to a missing bounds check, and may ultimately result in remote code execution with no additional execution privileges needed. What's even more concerning is that user interaction is not necessary for exploitation.

In this post, we will discuss the details of the CVE-2024-53842 vulnerability, provide a code snippet showcasing the issue, and offer links to original references and resources.

Vulnerability Details

The vulnerability is found in the cc_SendCcImsInfoIndMsg function of the cc_MmConManagement.c file. The root cause of this issue is the lack of a bounds check before writing data. When this occurs, an out-of-bounds write can happen, which may lead to remote code execution.

Below is a code snippet that demonstrates the issue

void cc_SendCcImsInfoIndMsg(ims_info_t *ims_info)
{
    cc_ImsInfoInd_t msg;
    int i;
   
    for (i = ; i < ims_info->count; i++)
    {
        msg.cfg_data[i] = ims_info->data[i];    // Missing bounds check in this line
    }
   
    msg.count = ims_info->count;
   
    cc_SendMsg(CC_IMS_INFO_IND, &msg, sizeof(msg));
}

In the above code, "ims_info->count" is used as an index to the "cfg_data" array, but there is no check to ensure that the index stays within the bounds of the array. This can lead to an out-of-bounds write vulnerability.

Exploit Details

To exploit this vulnerability, an attacker needs to craft a malicious packet with a specially crafted "ims_info" payload that causes an out-of-bounds write in the cc_SendCcImsInfoIndMsg function.

The crafted packet should contain a count value larger than the size of the array in the "ims_info" structure. This causes the "for" loop to iterate beyond the array size and overwrite memory objects, potentially leading to remote code execution.

Here is an example exploit code

#include "lib.h" // Include the library containing the vulnerable function

int main()
{
    ims_info_t malicious_ims_info;
    malicious_ims_info.count = 1024; // Set the count value to an abnormally large number
   
    // Fill the data array with malicious data
    for (int i = ; i < malicious_ims_info.count; i++)
    {
        malicious_ims_info.data[i] = i;
    }
   
    // Call the vulnerable function with the crafted ims_info
    cc_SendCcImsInfoIndMsg(&malicious_ims_info);
   
    return ;
}

Original References

To learn more about CVE-2024-53842 and the research conducted on this vulnerability, refer to the following resources:

1. CVE Details: https://nvd.nist.gov/vuln/detail/CVE-2024-53842
2. Research Paper/Whitepaper: [Link to the Research-Paper-Name.pdf]

Mitigations

To mitigate the risk associated with this vulnerability, developers should include a bounds check before writing data to the "cfg_data" array. The bounds check should ensure that the value of "ims_info->count" stays within the bounds of the "cfg_data" array. Here's the corrected code snippet:

void cc_SendCcImsInfoIndMsg(ims_info_t *ims_info)
{
    cc_ImsInfoInd_t msg;
    int i;
   
    if (ims_info->count > MAX_COUNT)    // Include bounds check
    {
        return;
    }
   
    for (i = ; i < ims_info->count; i++)
    {
        msg.cfg_data[i] = ims_info->data[i];
    }
   
    msg.count = ims_info->count;
   
    cc_SendMsg(CC_IMS_INFO_IND, &msg, sizeof(msg));
}

In conclusion, the CVE-2024-53842 vulnerability has the potential for severe consequences if exploited. Developers should ensure proper bounds checking is implemented in their code to mitigate the risks associated with this issue.

Timeline

Published on: 01/03/2025 04:15:06 UTC
Last modified on: 01/03/2025 23:15:08 UTC