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Security Advisory - Plug-in Signature Bypass Vulnerability in Some Huawei Products

  • SA No:huawei-sa-20180827-01-gateway
  • Initial Release Date: Aug 27, 2018
  • Last Release Date: Aug 27, 2018

There is a plug-in signature bypass vulnerability in some Huawei products due to insufficient plug-in verification. An attacker may tamper with a legitimate plug-in to build a malicious plug-in and trick users into installing it. Successful exploit could allow the attacker to obtain the root permission of the device and take full control over the device. (Vulnerability ID: HWPSIRT-2018-02029)
This vulnerability has been assigned a CVE ID: CVE-2018-7937. 
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-20180827-01-gateway-en

Product Name

Affected Version

Resolved Product and Version

HiRouter-CD20

The versions before HiRouter-CD20-10 1.9.6

HiRouter-CD20-10 1.9.6

WS5200-10

The versions before WS5200-10 1.9.6

Upgrade to WS5200-10 1.9.6

Successful exploit could allow the attacker to obtain the root permission of the device and take full control over the device.
The vulnerability classification has been performed by using the CVSSv3 scoring system (http://www.first.org/cvss/specification-document).
Base Score: 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Temporal Score: 7.2 (E:F/RL:O/RC:C)
This vulnerability can be exploited only when the following conditions are present:
The attacker tricks a user into installing a malicious application.
Vulnerability details:
There is a plug-in signature bypass vulnerability in some Huawei products due to insufficient plug-in verification. An attacker may tamper with a legitimate plug-in to build a malicious plug-in and trick users into installing it. Successful exploit could allow the attacker to obtain the root permission of the device and take full control over the device.

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

This vulnerability was discovered by Huawei internal tester.

2018-08-27 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.

This document is provided on an "AS IS" basis and does not imply any kind of guarantee or warranty, either express or implied, including the warranties of merchantability or fitness for a particular purpose. In no event shall Huawei or any of its directly or indirectly controlled subsidiaries or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages. Your use of the document, by whatsoever means, will be totally at your own risk. Huawei is entitled to amend or update this document from time to time.