Description
The UniFi Video Server v3.9.3 and prior (for Windows 7/8/10 x64) web interface Firmware Update functionality, under certain circumstances, does not validate firmware download destinations to ensure they are within the intended destination directory tree. It accepts a request with a URL to firmware update information. If the version field contains ..\ character sequences, the destination file path to save the firmware can be manipulated to be outside the intended destination directory tree. Fixed in UniFi Video Controller v3.10.3 and newer.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_confirm
https://community.ui.com/releases/Security-advisory-bulletin-006-006/3cf6264e-e0e6-4e26-a331-1d271f84673e
Scores
CVSS v3
8.4
EPSS
0.0075
EPSS Percentile
50.2%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Details
CWE
CWE-22
Status
published
Products (1)
ui/unifi_video
< 3.9.3
Published
Apr 01, 2020
Tracked Since
Feb 18, 2026