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Security Advisory - Use After Free Vulnerability in Huawei Product

  • SA No:huawei-sa-20210210-01-uaf
  • Initial Release Date: Feb 10, 2021
  • Last Release Date: Aug 11, 2021

There is a use-after-free vulnerability in Huawei product. A module cannot deal with specific operations in special scenarios. Attackers can exploit this vulnerability by performing malicious operations. This can cause memory use-after-free, compromising normal service. (Vulnerability ID: HWPSIRT-2020-11444)

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2021-22321.
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-20210210-01-uaf-en

Product Name

Affected Version

Resolved Product and Version

NIP6300

V500R001C30

V500R005C20SPC500

V500R001C60

NIP6600

V500R001C30

V500R005C20SPC500

NIP6800

V500R001C60

V500R005C20SPC500

S12700

V200R007C01

V200R013C00SPC500

V200R008C00

V200R010C00

V200R011C00

V200R011C10

S1700

V200R009C00SPC200

V200R013C00SPC500

V200R009C00SPC500

V200R010C00

V200R011C00

V200R011C10

S2700

V200R008C00

V200R013C00SPC500

V200R010C00

V200R011C00

V200R011C10

S5700

V200R008C00

V200R013C00SPC500

V200R010C00

V200R011C00

V200R011C10

S6700

V200R008C00

V200R013C00SPC500

V200R010C00

V200R011C00

V200R011C10

S7700

V200R008C00

V200R013C00SPC500

V200R010C00

V200R011C00

V200R011C10

S9700

V200R007C01

V200R013C00SPC500

V200R008C00

V200R010C00

V200R011C00

V200R011C10

Secospace USG6300

V500R001C30

V500R005C20SPC500

V500R001C60

Secospace USG6500

V500R001C30

V500R005C20SPC500

V500R001C60

Secospace USG6600

V500R001C30

V500R005C20SPC500

V500R001C60

USG9500

V500R001C30

V500R005C20SPC500

V500R001C60



Attackers can exploit this vulnerability by performing malicious operations. This can cause memory use-after-free, compromising normal service.

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

Base Score: 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Temporal Score: 4.9 (E:F/RL:O/RC:C)

This vulnerability can be exploited only when the following conditions are present:

Attackers can send specific message to affected module.

Vulnerability details:

A module cannot deal with specific operations in special scenarios. Attackers can exploit this vulnerability by performing malicious operations. This can cause memory use-after-free, compromising normal service.

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.

This vulnerability was discovered by Huawei internal tester.


2021-08-11 V1.1 UPDATED Assigned a CVE ID(CVE-2021-22321) to the vulnerability; Updated the "Software Versions and Fixes" section;

2021-02-10 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.