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Huawei Mobile WiFi E5151 and E5186 routers use insufficiently random values for DNS queries

Vulnerability Note VU#972224

Original Release Date: 2016-02-01 | Last Revised: 2016-02-01


Huawei Mobile WiFi E5151, firmware version, and E5186, firmware version V200R001B306D01C00, use insufficiently random values for DNS queries and are vulnerable to DNS spoofing attacks.


CWE-330: Use of Insufficiently Random Values - CVE-2015-8265

Huawei Mobile WiFi E5151 and E5186 routers use static source ports for all DNS queries originating from the local area network (LAN). An attacker with the ability to spoof DNS responses can cause E5151 or E5186 LAN clients to contact incorrect or malicious hosts under the attacker's control.

The following graph shows a distribution of 114 DNS queries captured on the WAN port of the E5151:


A remote, unauthenticated attacker may be able to spoof DNS responses to cause E5151 or E5186 LAN clients to contact attacker-controlled hosts.


Apply an update

An update is available for the E5151 and can be obtained by contacting SmarTone at

Huawei has released firmware version V200R001B310D01SP00C00 to address this vulnerability in the E5186. According to the vendor's security advisory, users should contact Huawei TAC to request an upgrade.

Vendor Information


Huawei Technologies Affected

Notified:  October 08, 2015 Updated: December 10, 2015



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group Score Vector
Base 5 AV:N/AC:L/Au:N/C:N/I:P/A:N
Temporal 3.9 E:POC/RL:OF/RC:C
Environmental 1.0 CDP:ND/TD:L/CR:ND/IR:ND/AR:ND



These vulnerabilities were reported by Joel Land of the CERT/CC.

This document was written by Joel Land.

Other Information

CVE IDs: CVE-2015-8265
Date Public: 2016-02-01
Date First Published: 2016-02-01
Date Last Updated: 2016-02-01 17:59 UTC
Document Revision: 14

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