High severity · published Nov 10, 2020
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…
7.8
CVSS
0.5%
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 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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% 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-2020-28055
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-28055
Exploit
https://github.com/sickcodes/security/blob/master/advisories/SICK-2020-012.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://securityledger.com/2020/11/security-holes-opened-back-door-to-tcl-android-smart-tvs/
Third Party Advisory
https://securityledger.com/2020/11/tv-maker-tcl-denies-back-door-promises-better-process/
Exploit
https://sick.codes/extraordinary-vulnerabilities-discovered-in-tcl-android-tvs-now-worlds-3rd-largest-tv-manufacturer/
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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…