Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2025-34036

Severity CVSS v4.0:
CRITICAL
Type:
CWE-20 Input Validation
Publication date:
24/06/2025
Last modified:
09/07/2025

Description

An OS command injection vulnerability exists in white-labeled DVRs manufactured by TVT, affecting a custom HTTP service called "Cross Web Server" that listens on TCP ports 81 and 82. The web interface fails to sanitize input in the URI path passed to the language extraction functionality. When the server processes a request to /language/[lang]/index.html, it uses the [lang] input unsafely in a tar extraction command without proper escaping. This allows an unauthenticated remote attacker to inject shell commands and achieve arbitrary command execution as root.

Impact

Vector 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS v4.0 Severity and Metrics:

Base Score: 10.00 CRITICAL
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): High
Integrity (VI): High
Availability (VA): High
Confidentiality (SC): High
Integrity (SI): High
Availability (SA): High

Base Score 4.0
10.00
Severity 4.0
CRITICAL
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.80
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:tvt:td-2108ts-cl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:tvt:td-2108ts-cl:-:*:*:*:*:*:*:*
cpe:2.3:o:tvt:td-2108ts-cl-a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:tvt:td-2108ts-cl-a:-:*:*:*:*:*:*:*
cpe:2.3:o:tvt:td-2116ts-cl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:tvt:td-2116ts-cl:-:*:*:*:*:*:*:*
cpe:2.3:o:tvt:td-2104ts-hc_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:tvt:td-2104ts-hc:-:*:*:*:*:*:*:*
cpe:2.3:o:tvt:td-2108ts-hc_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:tvt:td-2108ts-hc:-:*:*:*:*:*:*:*
cpe:2.3:o:tvt:td-2116ts-hc_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:tvt:td-2116ts-hc:-:*:*:*:*:*:*:*
cpe:2.3:o:tvt:td-2104ts-hp_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:tvt:td-2104ts-hp:-:*:*:*:*:*:*:*
cpe:2.3:o:tvt:td-2108ts-hp_firmware:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools