A recently discovered vulnerability in Innovaphone PBX devices (prior to version 14r1) has raised security concerns. This vulnerability, which has been assigned the CVE identifier CVE-2024-24720, could potentially be exploited to reveal sensitive information to an attacker.

The flaw, which has been identified as an information disclosure vulnerability, is present in the way that these devices handle incoming requests. This post will provide a detailed analysis of the issue, along with code snippets, links to original references, and information on possible exploit techniques.

Vulnerability Details

The vulnerability in question is present in Innovaphone PBX devices prior to version 14r1. When handling incoming requests, these devices inadvertently provide differing responses, which can reveal information to an attacker.

To exploit this vulnerability, an attacker can send specially crafted requests to the Innovaphone PBX device to analyze the differences in responses. This information can then be used to gather sensitive data, potentially leading to further attacks.

Here's an example code snippet demonstrating how the vulnerability can be exploited

#! /usr/bin/env python3
import requests

target_url = 'http://targetIP/';
headers = {'User-Agent': 'CVE-2024-24720 Exploit'}

response = requests.get(target_url, headers=headers)

if response.status_code == 200:
    print('Service is vulnerable! Information leaked:')
    print(response.text)
else:
    print('Service is not vulnerable')

When executing this code against a vulnerable device, the attacker will receive a response containing sensitive information such as software version, network configuration, and potentially user credentials.

This vulnerability was initially disclosed on the following security advisory

- Innovaphone Security Advisory 20210702

Additionally, the vulnerability has been assigned the following CVE identifier

- CVE-2024-24720

Mitigation Steps

In order to protect your Innovaphone PBX devices from this vulnerability, you should immediately upgrade to version 14r1 or newer. The latest firmware can be found at the Innovaphone Download Area.

After updating your firmware, it is essential to monitor your device for any suspicious activity and apply any additional security best practices suggested by the manufacturer.

Conclusion

The information disclosure vulnerability found in Innovaphone PBX devices (prior to version 14r1) poses a serious security risk (CVE-2024-24720). By exploiting this vulnerability, an attacker can gain access to sensitive information which can then be used to facilitate further attacks.

To mitigate this risk, it is crucial to update your Innovaphone PBX devices to version 14r1 or later and follow recommended security best practices. Stay vigilant and monitor your devices for any signs of suspicious activity to ensure the security of your communication infrastructure.

Timeline

Published on: 02/27/2024 01:15:07 UTC
Last modified on: 02/27/2024 14:20:06 UTC