CVE-2025-66263
Severity CVSS v4.0:
HIGH
Type:
Unavailable / Other
Publication date:
26/11/2025
Last modified:
26/11/2025
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.<br />
The `/var/tdf/download_setting.php` endpoint constructs file paths by concatenating user-controlled `$_GET[&#39;filename&#39;]` 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.
Impact
Base Score 4.0
8.90
Severity 4.0
HIGH