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OBi1022 - Improper Neutralization of Special Elements used in an OS Command

Vulnerability Summary

A vulnerability in the web-based management interface of Obihai OBi1022 phones running EX version firmware, up to 5.1.11 on Build: 4858EX.1311, if exploited, could allow an authenticated, remote attacker with admin privileges to execute arbitrary code or cause a denial of service (DoS) condition.



CVE 2019-14259
On the Polycom Obihai Obi1022 VoIP phone with firmware 5.1.11, a command injection (missing input validation) issue in the NTP server IP address field for the "Time Service Settings web" interface allows an authenticated remote attacker in the same network to trigger OS commands via shell commands in a POST request.

Poly released a firmware update to address this vulnerability.  There is no workaround.


Last Update: 3/7/2022
Initial Public Release: 8/7/2019
Advisory ID:  PLYVC19-07

CVE ID: CVE-2019-14259
CVSS Score: 8.0

Product Affected

Prior to 5.1.11

Update to 5.1.11 (Build: 4983EX)

Poly recommends customers upgrade to firmware build 5.1.11 or later.
Download OBi Phone Firmware update.



In addition, as a further mitigation and aligned with standard security best practices, Poly also recommends that customers change the Admin password on the phones from a default or weak password to a strong (minimum 10 character) password. This mitigation limits the ability of the attacker to compromise the phone and is the quickest measure that can be taken to reduce risk.


Any customer using an affected system who is concerned about this vulnerability within their deployment should contact Poly Technical Support(888) 248-4143, (916) 928-7561, or visit the Poly Support Site.



Poly would like to thank Stephan Huber and Philipp Roskosch from Fraunhofer SIT for reporting security vulnerabilities to us and for their coordinated disclosure.

Revision History
1.0 8/7/2019 Initial Release
2.0 3/2/2022 Format Changes

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