Vulnerability Monitor

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CVE-2020-28055

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 a local unprivileged attacker, such as a malicious App, to read & write to the /data/vendor/tcl, /data/vendor/upgrade, and /var/TerminalManager directories within the TV file system. An attacker, such as a malicious APK or local unprivileged user could perform fake system upgrades by writing to the /data/vendor/upgrage folder.

Published

2020-11-10T18:15:12.137

Last Modified

2024-11-21T05:22:17.723

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-732

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/security/blob/master/advisories/SICK-2020-012.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://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-2020-012 Exploit, Third Party Advisory ([email protected])
https://support.tcl.com/vulnerabilities-found-in-tcl-android-tvs Vendor Advisory ([email protected])
https://twitter.com/johnjhacking/ Third Party Advisory ([email protected])
https://twitter.com/sickcodes/ Third Party Advisory ([email protected])
https://github.com/sickcodes/security/blob/master/advisories/SICK-2020-012.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://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-2020-012 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)
https://twitter.com/johnjhacking/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://twitter.com/sickcodes/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)