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Security Advisory - Improper Authentication Vulnerability in Several Smartphones

  • SA No:huawei-sa-20200108-02-smartphone
  • Initial Release Date: Jan 08, 2020
  • Last Release Date: Jan 08, 2020

There is an improper authentication vulnerability in several smartphones. The system has a logic error under certain scenario, successful exploit could allow the attacker who gains the privilege of guest user to access to the host user's desktop in an instant, without unlocking the screen lock of the host user. (Vulnerability ID: HWPSIRT-2019-08126)

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2020-1787.

Huawei has released software updates to fix this vulnerability. This advisory is available at the following link:

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

Product Name

Affected Version

Resolved Product and Version

HUAWEI Mate 20

Versions earlier than 9.1.0.139(C00E133R3P1)

9.1.0.139(C00E133R3P1)


Successful exploit could allow the attacker who gains the privilege of guest user to skip to the host user's desktop in an instant, without unlocking the screen lock of the host user.


The vulnerability classification has been performed by using the CVSSv3 scoring system (http://www.first.org/cvss/specification-document).

Base Score: 3.2 (AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)

Temporal Score: 3.0 (E:F/RL:O/RC:C)

This vulnerability can be exploited only when the following conditions are present:

Certain key configuration is different in guest and host mode.

Vulnerability details:

The system has a logic error under certain scenario, successful exploit could allow the attacker who gains the privilege of guest user to skip to the host user's desktop in an instant, without unlocking the screen lock of the host user.

The product that supports automatic update will receive a system update prompt. You can install the update to fix the vulnerability.

This vulnerability was reported to Huawei PSIRT by an external security researcher Ding Yicong. Huawei would like to thank Ding Yicong for working with us and coordinated vulnerability disclosure to protect our customers.

2020-01-08 V1.0 INITIAL

Huawei adheres to protecting the ultimate interests of users with best efforts and the principle of responsible disclosure and deal with product security issues through our response mechanism.

To enjoy Huawei PSIRT services and obtain Huawei product vulnerability information, please visit http://www.huawei.com/en/psirt.

To report a security vulnerability in Huawei products and solutions, please send it to PSIRT@huawei.com. For details, please visit http://www.huawei.com/en/psirt/report-vulnerabilities.

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