Path Traversal in Yeahlink T49g
CVE-2019-14657
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.037 (89.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000
Affected products
Weakness classification (CWE)
References
- cerebusforensics.com/yealink/exploit.html (Exploit, Third Party Advisory)
- sway.office.com/3pCb559LYVuT0eig (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-14657?
- CVE-2019-14657 is a high-severity vulnerability in Yeahlink T49g, classified under Path Traversal. CVSS score: 8.8/10. Published 2019-10-08.
- How severe is CVE-2019-14657?
- High severity. CVSS v3 base score is 8.8 out of 10.