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 `$_GET['filename']` with a forced `.tgz` extension. Running on PHP 5.3.2 (pre-5.3.4), the application is vulnerable to null byte injection (%00), allowing attackers to bypass the extension restriction and traverse paths. By requesting `filename=../../../../etc/passwd%00`, the underlying C functions treat the null byte as a string terminator, ignoring the appended `.tgz` and enabling unauthenticated arbitrary file disclosure of any file readable by the web server user.
Metrics
Affected Vendors & Products
References
| Link | Providers |
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| https://www.abdulmhsblog.com/posts/webfmvulns/ |
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History
Wed, 26 Nov 2025 01:15:00 +0000
| Type | Values Removed | Values Added |
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| Description | Unauthenticated Arbitrary File Read via Null Byte Injection in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, 7000 allows an attacker to perform Null byte injection in download_setting.php allows reading arbitrary files. The `/var/tdf/download_setting.php` endpoint constructs file paths by concatenating user-controlled `$_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. | |
| Title | Unauthenticated Arbitrary File Read via Null Byte Injection | |
| Weaknesses | CWE-158 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: Gridware
Published: 2025-11-26T00:52:24.390Z
Updated: 2025-11-26T16:10:21.364Z
Reserved: 2025-11-26T00:21:58.504Z
Link: CVE-2025-66263
No data.
Status : Received
Published: 2025-11-26T01:16:09.880
Modified: 2025-11-26T01:16:09.880
Link: CVE-2025-66263
No data.