The FreePBX module tts (Text to Speech) for FreePBX, an open-source web-based graphical user interface (GUI) that manages Asterisk. Versions prior to 16.0.5 and 17.0.5 are vulnerable to SQL injection by authenticated users with administrator access. Authenticated users with administrative access to the Administrator Control Panel (ACP) can leverage this SQL injection vulnerability to extract sensitive information from the database and execute code on the system as the asterisk user with chained elevation to root privileges. Users should upgrade to version 16.0.5 or 17.0.5 to receive a fix.

FreePBX is an open-source web-based graphical user interface (GUI) that manages Asterisk. Prior to versions 16.0.45 and 17.0.24 of the FreePBX framework, an authenticated local privilege escalation exists in the deprecated FreePBX startup script amportal. In the deprecated amportal utility, the lookup for the freepbxengine file occurs in /etc/asterisk/ directories. Typically, these are configured by FreePBX as writable by the asterisk user and any members of the asterisk group. This means that a member of the asterisk group can add their own freepbxengine file in /etc/asterisk/ and upon amportal executing, it would exec that file with root permissions (even though the file was created and placed by a non-root user). Version 16.0.45 and 17.0.24 contain a fix for the issue. Other mitigation strategies are also available. Confirm only trusted local OS system users are members of the asterisk group. Look for suspicious files in the /etc/asterisk/ directory (via Admin -> Config Edit in the GUI, or via CLI). Double-check that livedangerously = no is set (or unconfigured, as the default is no) in /etc/asterisk/asterisk.conf file. Eliminate any unsafe custom use of Asterisk dial plan applications and functions that potentially can manipulate the file system, e.g., System(), FILE(), etc.

FreePBX is an open-source web-based graphical user interface. In FreePBX 15, 16, and 17, malicious connections to the Administrator Control Panel web interface can cause the uninstall function to be triggered for certain modules. This function drops the module's database tables, which is where most modules store their configuration. This vulnerability is fixed in 15.0.38, 16.0.41, and 17.0.21.