Unauthenticated Arbitrary File Read via Null Byte Injection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-66263
StatePUBLISHED
AssignerGridware
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-11-26 01:16:09 UTC
Updated2026-10-19 13:10:00 UTC
DescriptionUnauthenticated 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.

Risk And Classification

Primary CVSS: v4.0 8.9 HIGH from b7efe717-a805-47cf-8e9a-921fca0ce0ce

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-158 | CWE-158 CWE-158 Unauthenticated Arbitrary File Read via Null Byte Injection

VersionSourceTypeScoreSeverityVector
4.0b7efe717-a805-47cf-8e9a-921fca0ce0ceSecondary8.9HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/C...
4.0CNACVSS8.9HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Sub Conf.
High
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Dbbroadcast Mozart Dds Next 100 - All All All
Hardware Dbbroadcast Mozart Dds Next 1000 - All All All
Operating System Dbbroadcast Mozart Dds Next 1000 Firmware - All All All
Operating System Dbbroadcast Mozart Dds Next 100 Firmware - All All All
Hardware Dbbroadcast Mozart Dds Next 2000 - All All All
Operating System Dbbroadcast Mozart Dds Next 2000 Firmware - All All All
Hardware Dbbroadcast Mozart Dds Next 30 - All All All
Hardware Dbbroadcast Mozart Dds Next 300 - All All All
Hardware Dbbroadcast Mozart Dds Next 3000 - All All All
Operating System Dbbroadcast Mozart Dds Next 3000 Firmware - All All All
Operating System Dbbroadcast Mozart Dds Next 300 Firmware - All All All
Operating System Dbbroadcast Mozart Dds Next 30 Firmware - All All All
Hardware Dbbroadcast Mozart Dds Next 3500 - All All All
Operating System Dbbroadcast Mozart Dds Next 3500 Firmware - All All All
Hardware Dbbroadcast Mozart Dds Next 50 - All All All
Hardware Dbbroadcast Mozart Dds Next 500 - All All All
Operating System Dbbroadcast Mozart Dds Next 500 Firmware - All All All
Operating System Dbbroadcast Mozart Dds Next 50 Firmware - All All All
Hardware Dbbroadcast Mozart Dds Next 6000 - All All All
Operating System Dbbroadcast Mozart Dds Next 6000 Firmware - All All All
Hardware Dbbroadcast Mozart Dds Next 7000 - All All All
Operating System Dbbroadcast Mozart Dds Next 7000 Firmware - All All All
Hardware Dbbroadcast Mozart Next 100 - All All All
Hardware Dbbroadcast Mozart Next 1000 - All All All
Operating System Dbbroadcast Mozart Next 1000 Firmware - All All All
Operating System Dbbroadcast Mozart Next 100 Firmware - All All All
Hardware Dbbroadcast Mozart Next 2000 - All All All
Operating System Dbbroadcast Mozart Next 2000 Firmware - All All All
Hardware Dbbroadcast Mozart Next 30 - All All All
Hardware Dbbroadcast Mozart Next 300 - All All All
Hardware Dbbroadcast Mozart Next 3000 - All All All
Operating System Dbbroadcast Mozart Next 3000 Firmware - All All All
Operating System Dbbroadcast Mozart Next 300 Firmware - All All All
Operating System Dbbroadcast Mozart Next 30 Firmware - All All All
Hardware Dbbroadcast Mozart Next 3500 - All All All
Operating System Dbbroadcast Mozart Next 3500 Firmware - All All All
Hardware Dbbroadcast Mozart Next 50 - All All All
Hardware Dbbroadcast Mozart Next 500 - All All All
Operating System Dbbroadcast Mozart Next 500 Firmware - All All All
Operating System Dbbroadcast Mozart Next 50 Firmware - All All All
Hardware Dbbroadcast Mozart Next 6000 - All All All
Operating System Dbbroadcast Mozart Next 6000 Firmware - All All All
Hardware Dbbroadcast Mozart Next 7000 - All All All
Operating System Dbbroadcast Mozart Next 7000 Firmware - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 30 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 50 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 100 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 300 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 500 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 1000 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 2000 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 3000 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 3500 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 6000 Not specified
CNA DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter affected 7000 Not specified

References

ReferenceSourceLinkTags
www.abdulmhsblog.com/posts/webfmvulns b7efe717-a805-47cf-8e9a-921fca0ce0ce www.abdulmhsblog.com Exploit, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Abdul Mhanni (en)

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