Description
On TCL Alcatel Cingular Flip 2 B9HUAH1 devices, PIN authentication can be bypassed by creating a special file within the /data/local/tmp/ directory. The System application that implements the lock screen checks for the existence of a specific file and disables PIN authentication if it exists. This file would typically be created via Android Debug Bridge (adb) over USB.
References (2)
Core 2
Core References
Third Party Advisory x_refsource_misc
https://www.nccgroup.trust/uk/our-research/?research=Technical+advisories
Exploit, Third Party Advisory x_refsource_misc
https://www.nccgroup.trust/us/our-research/technical-advisory-multiple-vulnerabilities-in-alcatel-flip-2/#C
Scores
CVSS v3
6.8
EPSS
0.0048
EPSS Percentile
37.5%
Attack Vector
PHYSICAL
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-668
Status
published
Products (1)
alcatelmobile/cingular_flip_2_firmware
b9huah1
Published
Nov 26, 2019
Tracked Since
Feb 18, 2026