CVE-2021-21879 Path traversal in Lantronix
An authenticated attacker can exploit a directory traversal flaw in the file upload feature to overwrite arbitrary files on the device.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21879?
CVE-2021-21879 is a critical path traversal vulnerability in Lantronix, published on 22 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A directory traversal vulnerability exists in the Web Manager File Upload functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially-crafted HTTP request can lead to arbitrary file overwrite. An attacker can make an authenticated HTTP request to trigger this vulnerability.
Weakness: CWE-22
Which versions are affected by CVE-2021-21879?
It affects 1 product.
Products include Lantronix Premierwave 2050.
How do I fix CVE-2021-21879?
No fix has been published for CVE-2021-21879 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-2021-21879 being exploited?
There is no known exploitation of CVE-2021-21879 in the wild and no public exploit code.
Sources
Also known as GHSA-5g9q-q7rm-5vq9.