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Security Advisory - Two Privilege Escalation Vulnerabilities in Huawei Mate 7 Smartphones

  • SA No:Huawei-SA-20150520-01-MATE7
  • Initial Release Date: 2015-05-20
  • Last Release Date: 2015-06-09


The tzdriver module of Huawei Mate 7 smartphone has an input check error, which allows the user-mode application to modify kernel-mode memory data and maybe make system break down or application elevate privilege. (Vulnerability ID: HWPSIRT-2015-03011)

These Vulnerabilities have been assigned Common Vulnerabilities and Exposures (CVE) ID: CVE-2015-4421.

The TEEOS module of Huawei Mate 7 smartphone which is used to realize the function of fingerprint identification has an input check error, which enables the attackers with the root permission to modify kernel-mode memory data of TEEOS module, which could make system break down, TEEOS be tampered or malicious code execution. (Vulnerability ID: HWPSIRT-2015-03012)
These Vulnerabilities have been assigned Common Vulnerabilities and Exposures (CVE) ID: CVE-2015-4422.

Product Name

Affected Version

Resolved Product and Version

Mate7-TL10

V100R001CHNC00B123SP03 and earlier versions

V100R001CHNC00B126SP03



HWPSIRT-2015-03011:

Attackers can write data into an invalid address to crash the system or elevate their privileges through elaborate applications.

HWPSIRT-2015-03012:

After privilege escalation, attackers can craft malicious applications to crash the TEEOS or execute arbitrary code on the TEEOS.

The vulnerability classification has been performed by using the CVSSv2 scoring system (http://www.first.org/cvss/).

HWPSIRT-2015-03011:

Base Score: 6.2 (AV:L/AC:H/Au:N/C:C/I:C/A:C)

Temporal Score: 5.1 (E:F/RL:O/RC:C)

HWPSIRT-2015-03012:

Base Score: 6.0 (AV:L/AC:H/Au:S/C:C/I:C/A:C)

Temporal Score: 5.0 (E:F/RL:O/RC:C)

HWPSIRT-2015-03011:

1. Prerequisite:

An attacker needs to craft a malicious application and trick users into installing it.

2. Attacking procedure:

Users run the malicious application provided by the attacker.

HWPSIRT-2015-03012:

1. Prerequisite:

Users run the malicious application provided by the attacker.

2. Attacking procedure:

Users run the malicious application provided by the attacker.

Customers should contact Huawei TAC (Huawei Technical Assistance Center) to request the upgrades. For TAC contact information, please refer to Huawei worldwide website at http://www.huawei.com/en/security/psirt/report-vulnerabilities/index.htm.

This vulnerability was found by Di Shen (@returnsme) of Qihoo 360 Technology Co. Ltd. Huawei PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.

Huawei express our appreciation for Di Shen’s concerns on Huawei products.

For security problems about Huawei products and solutions, please contact PSIRT@huawei.com.

For general problems about Huawei products and solutions, please directly contact Huawei TAC (Huawei Technical Assistance Center) to request the configuration or technical assistance.

2015-06-09 V1.1 UPDATED added the CVE-ID

2015-05-20 V1.0 INITIAL

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Complete information for providing feedback on security vulnerability of Huawei products, getting support for Huawei security incident response services, and obtaining Huawei security vulnerability information, is available on Huawei's worldwide website at http://www.huawei.com/en/security/psirt/.