CVE-2022-24900 Absolute Path Traversal due to incorrect use of `send_file` call in Piano LED Visualizer
Attackers can read arbitrary files from the server by exploiting unsafe path joining in the Piano LED Visualizer application.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-24900?
CVE-2022-24900 is a critical path traversal vulnerability in onlaj Piano-LED-Visualizer, published on 29 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Piano LED Visualizer is software that allows LED lights to light up as a person plays a piano connected to a computer. Version 1.3 and prior are vulnerable to a path traversal attack. The `os.path.join` call is unsafe for use with untrusted input. When the `os.path.join` call encounters an absolute path, it ignores all the parameters it has encountered till that point and starts working with the new absolute path. Since the "malicious" parameter represents an absolute path, the result of `os.path.join` ignores the static directory completely. Hence, untrusted input is passed via the `os.path.join` call to `flask.send_file` can lead to path traversal attacks. A patch with a fix is available on the `master` branch of the GitHub repository. This can also be fixed by preventing flow of untrusted data to the vulnerable `send_file` function. In case the application logic necessiates this behaviour, one can either use the `flask.safe_join` to join untrusted paths or replace `flask.send_file` calls with `flask.send_from_directory` calls.
Which versions are affected by CVE-2022-24900?
It affects 1 product.
Products include Piano Led Visualizer Project Piano Led Visualizer.
How do I fix CVE-2022-24900?
No fix has been published for CVE-2022-24900 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2022-24900 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-24900 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-g78x-q3x8-r6m4.