DB Electronica Telecomunicazioni Mozart FM Transmitter up to 7000 start_upgrade.php exec filename os command injection

Summaryinfo

A vulnerability labeled as critical has been found in DB Electronica Telecomunicazioni Mozart FM Transmitter up to 7000. Affected by this issue is the function exec of the file start_upgrade.php. Executing a manipulation of the argument filename can lead to os command injection. This vulnerability is tracked as CVE-2025-66253. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as very critical was found in DB Electronica Telecomunicazioni Mozart FM Transmitter up to 7000. This vulnerability affects the function exec of the file start_upgrade.php. The manipulation of the argument filename with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Unauthenticated OS Command Injection (start_upgrade.php) 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 User input passed directly to exec() allows remote code execution via start_upgrade.php. The `/var/tdf/start_upgrade.php` endpoint passes user-controlled `$_GET["filename"]` directly into `exec()` without sanitization or shell escaping. Attackers can inject arbitrary shell commands using metacharacters (`;`, `|`, etc.) to achieve remote code execution as the web server user (likely root).

The weakness was disclosed by Abdul Mhanni. The advisory is shared for download at abdulmhsblog.com. This vulnerability was named CVE-2025-66253 since 11/26/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/04/2025). The MITRE ATT&CK project declares the attack technique as T1202.

By approaching the search of inurl:start_upgrade.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

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Vendor

• DB Electronica Telecomunicazioni

Name

• Mozart FM Transmitter

Version

• 30
• 50
• 100
• 300
• 500
• 1000
• 2000
• 3000
• 3500
• 6000
• 7000

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Once again VulDB remains the best source for vulnerability data.

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