CVE-2019-14657 Path traversal in n/a
Attackers can upload malicious tar files to Yealink phones to overwrite system files via path traversal, achieving root code execution.
- 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-2019-14657?
CVE-2019-14657 is a high-severity path traversal vulnerability in n/a, published on 8 Oct 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Yealink phones through 2019-08-04 have an issue with OpenVPN file upload. They execute tar as root to extract files, but do not validate the extraction directory. Creating a tar file with ../../../../ allows replacement of almost any file on a phone. This leads to password replacement and arbitrary code execution as root.
Which versions are affected by CVE-2019-14657?
It affects 3 products.
Products include Yeahlink T49g Firmware, Yeahlink T58v Firmware, Yeahlink Vp59 Firmware.
How do I fix CVE-2019-14657?
No fix has been published for CVE-2019-14657 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-2019-14657 being exploited?
There is no known exploitation of CVE-2019-14657 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-3hj6-89vp-w89r.