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.

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)

EPSS: 0.037 (88.7th percentile) — read the EPSS interpretation.

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.

Affected products

Weakness classification (CWE)

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

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.