Pandora FMS <= 5.0RC1 Anyterm Unauthenticated Command Injection

An unauthenticated remote command execution vulnerability exists in Pandora FMS versions up to and including 5.0RC1 via the Anyterm web interface, which listens on TCP port 8023. The anyterm-module endpoint accepts unsanitized user input via the p parameter and directly injects it into a shell command, allowing arbitrary command execution as the pandora user. In certain versions (notably 4.1 and 5.0RC1), the pandora user can elevate privileges to root without a password using a chain involving the artica user account. This account is typically installed without a password and is configured to run sudo without authentication. Therefore, full system compromise is possible without any credentials.