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.

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

9.0 HIGHAV:N/AC:L/Au:S/C:C/I:C/A:C

EPSS

3.74% chance of exploitation in the next 30 days, 89th percentile

Published

2019-10-08

Updated

2024-08-05

Proof-of-concept exploits (2)

• https://sway.office.com/3pCb559LYVuT0eig
• http://cerebusforensics.com/yealink/exploit.html

References

• CVE Record
• NVD entry

Related

• CVE-2019-14656
• CVE-2019-14664
• CVE-2019-1458
• CVE-2019-14666
• CVE-2019-14551
• CVE-2019-14667