VulnerabilityModified
CVE-2019-14657
They execute tar as root to extract files, but do not validate the extraction directory.
HIGH 8.8EPSS 3.74%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.74% probability · 89th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22, CWE-434
- Affected
- yeahlink/vp59 firmware · yeahlink/t49g firmware · yeahlink/t58v firmware
- Source
- cve@mitre.org
References
- http://cerebusforensics.com/yealink/exploit.htmlExploit, Third Party Advisory
- https://sway.office.com/3pCb559LYVuT0eigExploit, Third Party Advisory
- http://cerebusforensics.com/yealink/exploit.htmlExploit, Third Party Advisory
- https://sway.office.com/3pCb559LYVuT0eigExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.