Vulnerability Monitor

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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 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.

Published

2020-11-10T18:15:12.043

Last Modified

2024-11-21T05:21:10.800

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:P/I:N/A:N

Access Vector: ADJACENT_NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

6.5

Impact Score

2.9

Weaknesses

Type: Primary
CWE-200

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	tcl	32s330_firmware	< v8-r851t10-lf1v091	Yes
Hardware	tcl	32s330	-	No
Operating System	tcl	40s330_firmware	< v8-r851t10-lf1v091	Yes
Hardware	tcl	40s330	-	No
Operating System	tcl	43s434_firmware	< v8-r851t02-lf1v440	Yes
Hardware	tcl	43s434	-	No
Operating System	tcl	50s434_firmware	< v8-r851t02-lf1v440	Yes
Hardware	tcl	50s434	-	No
Operating System	tcl	55s434_firmware	< v8-r851t02-lf1v440	Yes
Hardware	tcl	55s434	-	No
Operating System	tcl	65s434_firmware	< v8-r851t02-lf1v440	Yes
Hardware	tcl	65s434	-	No
Operating System	tcl	75s434_firmware	< v8-r851t02-lf1v440	Yes
Hardware	tcl	75s434	-	No

References

https://github.com/sickcodes Third Party Advisory ([email protected])
https://github.com/sickcodes/security/blob/master/advisories/SICK-2020-009.md Exploit, Third Party Advisory ([email protected])
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_GlobalFAQ.pdf Third Party Advisory ([email protected])
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_Press-Statement-and-Questions_11162020.pdf Third Party Advisory ([email protected])
https://github.com/sickcodes/security/issues/1 Third Party Advisory ([email protected])
https://securityledger.com/2020/11/security-holes-opened-back-door-to-tcl-android-smart-tvs/ Third Party Advisory ([email protected])
https://securityledger.com/2020/11/tv-maker-tcl-denies-back-door-promises-better-process/ Third Party Advisory ([email protected])
https://sick.codes/extraordinary-vulnerabilities-discovered-in-tcl-android-tvs-now-worlds-3rd-largest-tv-manufacturer/ Exploit, Third Party Advisory ([email protected])
https://sick.codes/sick-2020-009 Exploit, Third Party Advisory ([email protected])
https://support.tcl.com/vulnerabilities-found-in-tcl-android-tvs Vendor Advisory ([email protected])
https://github.com/sickcodes Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/sickcodes/security/blob/master/advisories/SICK-2020-009.md Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_GlobalFAQ.pdf Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/sickcodes/security/blob/master/etc/CVE-2020-27403_CVE-2020-28055_Press-Statement-and-Questions_11162020.pdf Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/sickcodes/security/issues/1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://securityledger.com/2020/11/security-holes-opened-back-door-to-tcl-android-smart-tvs/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://securityledger.com/2020/11/tv-maker-tcl-denies-back-door-promises-better-process/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://sick.codes/extraordinary-vulnerabilities-discovered-in-tcl-android-tvs-now-worlds-3rd-largest-tv-manufacturer/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://sick.codes/sick-2020-009 Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.tcl.com/vulnerabilities-found-in-tcl-android-tvs Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)