CVE-2025-66263
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-26

Last updated on: 2025-12-03

Assigner: Gridware

Description
Unauthenticated Arbitrary File Read via Null Byte Injection in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, 7000 allows an attacker to perform Null byte injection in download_setting.php allows reading arbitrary files. The `/var/tdf/download_setting.php` endpoint constructs file paths by concatenating user-controlled `$_GET['filename']` with a forced `.tgz` extension. Running on PHP 5.3.2 (pre-5.3.4), the application is vulnerable to null byte injection (%00), allowing attackers to bypass the extension restriction and traverse paths. By requesting `filename=../../../../etc/passwd%00`, the underlying C functions treat the null byte as a string terminator, ignoring the appended `.tgz` and enabling unauthenticated arbitrary file disclosure of any file readable by the web server user.
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Meta Information
Published
2025-11-26
Last Modified
2025-12-03
Generated
2026-06-16
AI Q&A
2025-11-26
EPSS Evaluated
2026-06-15
NVD
CVE-2025-66263
Affected Vendors & Products
Showing 44 associated CPEs
Vendor Product Version / Range
dbbroadcast mozart_next_3000_firmware *
dbbroadcast mozart_next_3000 *
dbbroadcast mozart_next_3500_firmware *
dbbroadcast mozart_next_3500 *
dbbroadcast mozart_next_50_firmware *
dbbroadcast mozart_next_50 *
dbbroadcast mozart_next_500_firmware *
dbbroadcast mozart_next_500 *
dbbroadcast mozart_next_6000_firmware *
dbbroadcast mozart_next_6000 *
dbbroadcast mozart_next_7000_firmware *
dbbroadcast mozart_next_7000 *
dbbroadcast mozart_next_100_firmware *
dbbroadcast mozart_next_100 *
dbbroadcast mozart_next_1000_firmware *
dbbroadcast mozart_next_1000 *
dbbroadcast mozart_next_2000_firmware *
dbbroadcast mozart_next_2000 *
dbbroadcast mozart_next_30_firmware *
dbbroadcast mozart_next_30 *
dbbroadcast mozart_next_300_firmware *
dbbroadcast mozart_next_300 *
dbbroadcast mozart_dds_next_30_firmware *
dbbroadcast mozart_dds_next_30 *
dbbroadcast mozart_dds_next_50_firmware *
dbbroadcast mozart_dds_next_50 *
dbbroadcast mozart_dds_next_100_firmware *
dbbroadcast mozart_dds_next_100 *
dbbroadcast mozart_dds_next_300_firmware *
dbbroadcast mozart_dds_next_300 *
dbbroadcast mozart_dds_next_500_firmware *
dbbroadcast mozart_dds_next_500 *
dbbroadcast mozart_dds_next_1000_firmware *
dbbroadcast mozart_dds_next_1000 *
dbbroadcast mozart_dds_next_2000_firmware *
dbbroadcast mozart_dds_next_2000 *
dbbroadcast mozart_dds_next_3000_firmware *
dbbroadcast mozart_dds_next_3000 *
dbbroadcast mozart_dds_next_3500_firmware *
dbbroadcast mozart_dds_next_3500 *
dbbroadcast mozart_dds_next_6000_firmware *
dbbroadcast mozart_dds_next_6000 *
dbbroadcast mozart_dds_next_7000_firmware *
dbbroadcast mozart_dds_next_7000 *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-158 The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes NUL characters or null bytes when they are sent to a downstream component.
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Executive Summary

This vulnerability is an unauthenticated arbitrary file read in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30 through 7000. It occurs because the application uses a PHP script (download_setting.php) that concatenates a user-supplied filename parameter with a forced .tgz extension. Due to the PHP version (5.3.2) being vulnerable to null byte injection, an attacker can insert a null byte (%00) in the filename parameter to terminate the string early, bypassing the .tgz extension restriction. This allows the attacker to read any file on the server that the web server user can access, without authentication.

Impact Analysis

This vulnerability can allow an attacker to read arbitrary files on the server without authentication. This could lead to disclosure of sensitive information such as configuration files, credentials, or other private data stored on the server. Such unauthorized access can compromise the confidentiality of the system and potentially facilitate further attacks.

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