CVE-2022-38165 WithSecure through 2022-08-10 allows attackers to cause a denial of service (issue 4 of 5).

This can be done by sending a large amount of traffic to a specific server, thus exhausting the server’s resources. It is also possible to obtain access to the server by sending a specially crafted request, as shown below. end_request: - code:

Backdooring the Device

If you are interested in sending large amounts of traffic to a single server, this can be done by sending a large amount of requests to the server. These requests would need to contain an HTTP header like "X-Device-Type: APPLE" which indicates that the request is made from an Apple device. With this information, it is possible for hackers to gain access to the device and send traffic specifically for their needs.

Vulnerable code example

- url: https://example.com/ - data: {
- content_type: application/x-www-form-urlencoded
- method: POST
- params: "data=1"
} end_request

The Attacker Becomes a Man-in-the-Middle

Each of these methods is detailed in the "Assessing the Risk" section of this paper. There are two types of attacks that can be executed by a malicious user who has gained access to a website: passive and active. A passive attack happens when an attacker can eavesdrop on traffic between the server and client, as shown in Figure 1 below. An active attack occurs when an attacker can manipulate communication between the server and client, as shown in Figure 2 below.

This vulnerability allows an attacker with access to a website's network to conduct man-in-the-middle (MITM) attacks against web users by intercepting traffic intended for the website, thus creating a "man-in-the-middle" attack. This vulnerability can be exploited when connecting to a public Wi-Fi hotspot or accessing websites over unsecured connections such as cellular data networks or Wi-Fi hotspots where SSL/TLS is not enabled.

Exhaust resources and obtain access

- code:
HTTP/1.1 200 OK
- code:
Content-Length: 0
- code:
Content-Type: text/html; charset=UTF-8

Vulnerable controller software

The following is a screenshot of the vulnerable controller software
excerpted from the CVE-2022-38165 report.

References

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