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Security Advisory - Two Vulnerabilities in Some Huawei CPE Devices

  • SA No:huawei-sa-20170920-01-cpe
  • Initial Release Date: 2017-09-20
  • Last Release Date: 2017-09-20

The outdoor unit of some Customer Premise Equipment (CPE) has a no authentication vulnerability on a certain port. After accessing the network between the indoor and outdoor units of the CPE, an attacker can deliver commands to the specific port of the outdoor unit and execute them without authentication. Successful exploit could allow the attacker to take control over the outdoor unit. (Vulnerability ID: HWPSIRT-2017-06244)
This vulnerability has been assigned a CVE ID: CVE-2017-8155.
The outdoor unit of some CPE has a no authentication vulnerability on the serial port. An attacker can access the serial port on the circuit board of the outdoor unit and log in to the CPE without authentication. Successful exploit could allow the attacker to take control over the outdoor unit. (Vulnerability ID: HWPSIRT-2017-06245)
This vulnerability has been assigned a CVE ID: CVE-2017-8156.
Huawei has released software updates to fix these vulnerabilities. This advisory is available at the following link:
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20170920-01-cpe-en

Product Name

Affected Version

Resolved Product and Version

B2338-168

V100R001C00

V100R001C00SPC133


Successful exploit could allow the attacker to take control over the outdoor unit.

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

HWPSIRT-2017-06244:
Base Score: 8.8 (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Temporal Score: 8.2 (E:F/RL:O/RC:C)
HWPSIRT-2017-06245:
Base Score: 8.4 (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Temporal Score: 7.8 (E:F/RL:O/RC:C)
HWPSIRT-2017-06244:
This vulnerability can be exploited only when the following conditions are present:
Between the outdoor unit and indoor unit, the attacker needs to insert a switch that provides the Power over Ethernet (PoE) function and access the switch using a PC.
Vulnerability details:
After accessing the network between the indoor and outdoor units of the CPE, the attacker can deliver commands to a certain port of the outdoor unit and execute them without authentication. Successful exploit could allow the attacker to take control over the CPE.
HWPSIRT-2017-06245:
This vulnerability can be exploited only when the following conditions are present:
The attacker needs to open the enclosure of the outdoor unit and find the serial port on the board.
Vulnerability details:
An attacker can access the serial port on the circuit board of the outdoor unit and log in to the CPE without authentication. Successful exploit could allow the attacker to take control over the CPE.

1. The product that supports automatic update will receive a system update prompt. You can install the update to fix the vulnerability.
2. Customers should obtain upgrades through Huawei consumer business official website (http://emui.huawei.com/cn/portal.php).
3. 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/psirt/report-vulnerabilities/index.htm

These vulnerabilities were reported to Huawei PSIRT by Adam Pogorzelski. Huawei would like to thank Adam Pogorzelski for working with us and coordinated vulnerability disclosure to protect our customers.

2017-09-20 V1.0 INITIAL

The device B2338-168 / LTE Outdoor CPE = (B2338-168ODU) + (B2338-168IDU) is a product family consists of LTE Outdoor CPE + Indoor Dual Band Wi-Fi Router.

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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