CVE-2021-20121 Path traversal in Telus Wi-Fi Hub (PRV65B444A-S-TS)
An authenticated attacker with physical access can read arbitrary files from the Telus Wi-Fi Hub via a crafted USB drive and web requests.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20121?
CVE-2021-20121 is a medium-severity path traversal vulnerability in Telus Wi-Fi Hub (PRV65B444A-S-TS), published on 11 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Telus Wi-Fi Hub (PRV65B444A-S-TS) with firmware version 3.00.20 is vulnerable to an authenticated arbitrary file read. An authenticated user with physical access to the device can read arbitrary files from the device by preparing and connecting a specially prepared USB drive to the device, and making a series of crafted requests to the device's web interface.
Which versions are affected by CVE-2021-20121?
It affects 1 product.
Products include Telus Prv65b444a-S-Ts Firmware.
How do I fix CVE-2021-20121?
No fix has been published for CVE-2021-20121 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-2021-20121 being exploited?
There is no known exploitation of CVE-2021-20121 in the wild and no public exploit code.
Other vulnerabilities in Telus Wi-Fi Hub (PRV65B444A-S-TS)
Sources
Also known as GHSA-3xvx-2gw5-hgv2.