CVE-2022-24900

 

Published at: - 29-04-2022 04:15

Last modified: - 10-05-2022 07:42

Total changes: - 3

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

 

Verification logic

 

Reference

• https://github.com/onlaj/Piano-LED-Visualizer/commit/3f10602323cd8184e1c69a76b815655597bf0ee5
• https://github.com/onlaj/Piano-LED-Visualizer/security/advisories/GHSA-g78x-q3x8-r6m4
• https://github.com/onlaj/Piano-LED-Visualizer/blob/6a732caa812c83a807c711f3d091af99209cae7b/webinterface/views_api.py#L970
• https://github.com/onlaj/Piano-LED-Visualizer/pull/351
• https://github.com/onlaj/Piano-LED-Visualizer/issues/350

 

Keywords

NVD

 

CVE-2022-24900

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures