Lock screen bypass in HUAWEI Mate 20

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU24145

Risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1787

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local attacker to escalate privileges on the device.

The vulnerability exists due to a login error that can be used under under certain scenario to bypass the lock screen and gain unauthorized access to the device. An attacker with physical access to the device can bypass the lock screen.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Huawei Mate 20: 9.1.0.139 - Hima-AL00B/Hima-TL00B 9.0.0.200(C00E200R2P1)

External links

http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200108-02-smartphone-en

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.