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Security Advisory - ICMPv6 DoS Vulnerability in Huawei Switches

  • SA No:Huawei-SA-20160113-02-Switch
  • Initial Release Date: Jan 13, 2016
  • Last Release Date: Jan 13, 2016

Multiple Huawei switches improperly release memory for ICMPv6 packets of a specific type. After the switch receives a specially crafted ICMPv6 packet, memory leak occurs, causing the switch to restart if the allocated memory is exhausted. (Vulnerability ID: HWPSIRT-2015-11034)

This vulnerability has been assigned Common Vulnerabilities and Exposures (CVE) ID: CVE-2015-8676.

Huawei has released software updates to fix this vulnerability. This advisory is available at the following link:

Product Name

Affected Version

Resolved Product and Version

S5300EI/ S5300SI/ S5310HI/ S6300EI/ S2350EI/ S5300LI




Upgrade to V200R003C00



S9300/ S7700/ S9700




Upgrade to V200R003C00



S2300/ S3300



An attacker may exploit this vulnerability to launch DoS attacks against the device.

The vulnerability classification has been performed by using the CVSSv2 scoring system (

Base Score: 5.0 (AV:N/AC:L/Au:N/C:N/I:N/A:P)

Temporal Score: 4.1 (E:F/RL:O/RC:C)

1. Prerequisites:

The attacker can access to the network where the device resides.

2. Attacking procedure:

The attacker crafts special ICMPv6 packets and sends them to the device, and then a memory leak will be triggered on the device. The device will restart if the allocated memory is exhausted.

Customers should contact Huawei TAC (Huawei Technical Assistance Center) to request the upgrades. For TAC contact information, please refer to Huawei worldwide website at

This vulnerability was reported by Huawei internal tester.

2016-01-13 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. Please report to Huawei PSIRT at if you find any security vulnerability of Huawei products.

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