PT-2019-10228 · Xiaomi+1 · Ft5X46 Touchscreen Driver+1

Leoaccount · Published 2019-02-25 · Updated 2019-02-26 · CVE-2018-20787

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: ft5x46 touchscreen driver for custom Linux kernels on the Xiaomi perseus-p-oss MIX 3 device through 2018-11-26

Description: The issue is caused by an integer overflow due to missing size argument checks in the tpdbg write function within the ft5x46 ts.c file. This can be exploited to crash a device via a syscall by a crafted application on a rooted device.

Recommendations: For the ft5x46 touchscreen driver for custom Linux kernels on the Xiaomi perseus-p-oss MIX 3 device through 2018-11-26, consider disabling the tpdbg write function in drivers/input/touchscreen/ft5x46/ft5x46 ts.c as a temporary workaround to prevent device crashes until a patch is available.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2018-20787

Affected Products

Linux

Ft5X46 Touchscreen Driver

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2018-20787 · Security Note
• https://osv.dev/vulnerability/CVE-2018-20787 · Vendor Advisory
• https://github.com/MiCode/Xiaomi_Kernel_OpenSource/issues/991 · Note