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Security Advisory - Replay Attack Vulnerability of Users Abnormal Exit in VCN500

  • SA No:SA No: Huawei-SA-20151126-01-VCN500
  • Initial Release Date: Nov 26, 2015
  • Last Release Date: Nov 26, 2015

The operation and maintenance unit (OMU) of Huawei VCN500 (Video Cloud Node) does not process users’ abnormal exit properly in a specific scenario, which leaves the user’s session ID still valid. An attacker may exploit this vulnerability to launch replay attacks. (Vulnerability ID: HWPSIRT-2015-07042)

This vulnerability has been assigned Common Vulnerabilities and Exposures (CVE) ID: CVE-2015-8331.

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




An attacker may exploit this vulnerability to launch replay attacks against VCN500.

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

Base Score: 5.1 (AV:N/AC:H/Au:N/C:P/I:P/A:P)

Temporal Score: 4.2 (E:F/RL:O/RC:C)

1. Prerequisites:

The attacker gains access to the VCN500 network.

2. Attacking procedure:

When the user exits the system in the specific abnormal way and the attacker gets the message, the attacker can launch replay attacks by using the session ID in the message.

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 is reported by Huawei internal tester. Huawei PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.

For security problems about Huawei products and solutions, please

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

2015-11-26 V1.0 INITIAL

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