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Security Advisory - FRP Bypass Vulnerability in Huawei Smart Phones

  • SA No:huawei-sa-20170920-01-frpbypass
  • Initial Release Date: Sep 20, 2017
  • Last Release Date: Sep 20, 2017

There is Factory Reset Protection (FRP) bypass security vulnerability in some Huawei smart phones. When re-configuring the mobile phone using the factory reset protection (FRP) function, an attacker can login the configuration flow by Swype Keyboard and can perform some operations to update the Google account. As a result, the FRP function is bypassed. (Vulnerability ID: HWPSIRT-2017-07117)

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2017-2721.
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-20170920-01-frpbypass-en

Product Name

Affected Version

Resolved Product and Version

Berlin-L21

Berlin-L21C10B130

BLL-L21C10B360

Berlin-L21C185B133

BLL-L21C185B361

Berlin-L21HN

Berlin-L21HNC10B131

BLN-L21C10B360

Berlin-L21HNC185B140

BLN-L21C185B361

Berlin-L21HNC432B151

BLN-L21C432B360

Berlin-L22

Berlin-L22C636B160

Berlin-L22C636B360

Berlin-L22HN

Berlin-L22HNC636B130

Berlin-L22HNC636B360

Berlin-L22HNC675B150CUSTC675D001

BLN-L22C675B310CUSTC675D002

Berlin-L23

Berlin-L23C605B131

BLL-L23C605B364

Berlin-L24HN

Berlin-L24HNC567B110

BLN-L24C567B360

FRD-L02

FRD-L02C432B120

FRD-L02C432B380

FRD-L02C635B130

FRD-L02C635B360

FRD-L02C675B170CUSTC675D001

FRD-L02C675B310CUSTC675D001

FRD-L04

FRD-L04C567B162

FRD-L04C567B360

FRD-L04C605B131

FRD-L04C605B131CUSTC605D004

FRD-L09

FRD-L09C10B130

FRD-L09C10B360

FRD-L09C185B130

FRD-L09C185B360

FRD-L09C432B131

FRD-L09C432B360

FRD-L09C636B130

FRD-L09C636B360

FRD-L14

FRD-L14C567B162

FRD-L14C567B360

FRD-L19

FRD-L19C10B130

FRD-L19C10B360

FRD-L19C432B131

FRD-L19C432B360

FRD-L19C636B130

FRD-L19C636B360

An attacker can modify the configuration of the smart phone and cause the FRP bypass.

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

Base Score: 4.6 (AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Temporal Score: 4.3 (E:F/RL:O/RC:C)

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

Attacker gets the smart phone device.

Vulnerability details:

When re-configuring the mobile phone using the factory reset protection (FRP) function, an attacker can login the configuration flow by Swype Keyboard and can perform some operations to update the Google account. As a result, the FRP function is bypassed.

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 Aleksi Ylanen an ICT student. Huawei would like to thank Aleksi Ylanen for working with us and coordinated vulnerability disclosure to protect our customers.

2017-09-20 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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