Medium severity · published Nov 10, 2020
CVE-2020-27403
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…
6.5
CVSS
2.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
3F
32s330 Firmware · Tcl
before v8-r851t10-lf1v091 · source: NVD
4F
40s330 Firmware · Tcl
before v8-r851t10-lf1v091 · source: NVD
4F
43s434 Firmware · Tcl
before v8-r851t02-lf1v440 · source: NVD
5F
50s434 Firmware · Tcl
before v8-r851t02-lf1v440 · source: NVD
5F
55s434 Firmware · Tcl
before v8-r851t02-lf1v440 · source: NVD
6F
65s434 Firmware · Tcl
before v8-r851t02-lf1v440 · source: NVD
7F
75s434 Firmware · Tcl
before v8-r851t02-lf1v440 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27403
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27403
Third Party Advisory
https://github.com/sickcodes
Exploit
https://github.com/sickcodes/security/blob/master/advisories/SICK-2020-009.md
Third Party Advisory
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_GlobalFAQ.pdf
Third Party Advisory
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_Press-Statement-and-Questions_11162020.pdf
Third Party Advisory
https://github.com/sickcodes/security/issues/1
Third Party Advisory
https://securityledger.com/2020/11/security-holes-opened-back-door-to-tcl-android-smart-tvs/
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