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

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CVE-2020-27403

Severity CVSS v4.0:
Pending analysis
Type:
CWE-200 Information Leak / Disclosure
Publication date:
10/11/2020
Last modified:
21/07/2021

Description

A vulnerability in the TCL Android Smart TV series V8-R851T02-LF1 V295 and below and V8-T658T01-LF1 V373 and below by TCL Technology Group Corporation allows an attacker on the adjacent network to arbitrarily browse and download sensitive files over an insecure web server running on port 7989 that lists all files & directories. An unprivileged remote attacker on the adjacent network, can download most system files, leading to serious critical information disclosure. Also, some TV models and/or FW versions may expose the webserver with the entire filesystem accessible on another port. For example, nmap scan for all ports run directly from the TV model U43P6046 (Android 8.0) showed port 7983 not mentioned in the original CVE description, but containing the same directory listing of the entire filesystem. This webserver is bound (at least) to localhost interface and accessible freely to all unprivileged installed apps on the Android such as a regular web browser. Any app can therefore read any files of any other apps including Android system settings including sensitive data such as saved passwords, private keys etc.

Impact

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

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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

Base Score 3.x
6.50
Severity 3.x
MEDIUM
Vector 2.0
AV:A/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 3.30 LOW
Vector: AV:A/AC:L/Au:N/C:P/I:N/A:N

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0
3.30
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:tcl:32s330_firmware:*:*:*:*:*:*:*:* v8-r851t10-lf1v091 (excluding)
cpe:2.3:h:tcl:32s330:-:*:*:*:*:*:*:*
cpe:2.3:o:tcl:40s330_firmware:*:*:*:*:*:*:*:* v8-r851t10-lf1v091 (excluding)
cpe:2.3:h:tcl:40s330:-:*:*:*:*:*:*:*
cpe:2.3:o:tcl:43s434_firmware:*:*:*:*:*:*:*:* v8-r851t02-lf1v440 (excluding)
cpe:2.3:h:tcl:43s434:-:*:*:*:*:*:*:*
cpe:2.3:o:tcl:50s434_firmware:*:*:*:*:*:*:*:* v8-r851t02-lf1v440 (excluding)
cpe:2.3:h:tcl:50s434:-:*:*:*:*:*:*:*
cpe:2.3:o:tcl:55s434_firmware:*:*:*:*:*:*:*:* v8-r851t02-lf1v440 (excluding)
cpe:2.3:h:tcl:55s434:-:*:*:*:*:*:*:*
cpe:2.3:o:tcl:65s434_firmware:*:*:*:*:*:*:*:* v8-r851t02-lf1v440 (excluding)
cpe:2.3:h:tcl:65s434:-:*:*:*:*:*:*:*
cpe:2.3:o:tcl:75s434_firmware:*:*:*:*:*:*:*:* v8-r851t02-lf1v440 (excluding)
cpe:2.3:h:tcl:75s434:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools