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Security Advisory - Remote Code Execution Vulnerability in Windows DNSAPI

  • SA No:huawei-sa-20171220-02-windows
  • Initial Release Date: 2017-12-20
  • Last Release Date: 2020-08-12

Microsoft released a security advisory to disclose a remote code execution vulnerability in Windows Domain Name System (DNS) DNSAPI.dll. An unauthenticated, remote attacker would use a malicious DNS server to send corrupted DNS responses to the target. The attacker could exploit the vulnerability to run arbitrary code in the context of the Local System Account. (Vulnerability ID: HWPSIRT-2017-10073)

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2017-11779.

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-20171220-02-windows-en

Product Name

Affected Version

Resolved Product and Version

N2000 Appliance

V100R001C00

Follow the Microsoft security advisory to install the patch 

eSpace AEP

V200R001C50

Follow the Microsoft security advisory to install the patch 

eSpace BIR

V200R001C50

Follow the Microsoft security advisory to install the patch 

eSpace ICS

V200R001C50

Follow the Microsoft security advisory to install the patch 

eSpace POM

V200R001C50

Follow the Microsoft security advisory to install the patch 

eSpace POP

V200R001C50

Follow the Microsoft security advisory to install the patch 


The attacker could exploit the vulnerability to run arbitrary code in the context of the Local System Account.

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

Base Score: 8.1 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

Temporal Score: 7.5 (E:F/RL:O/RC:C)

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

1. The attacker gains the access of the affected products.

Vulnerability details:

An attacker would use a malicious DNS server to send corrupted DNS responses to the target. The attacker could exploit the vulnerability to run arbitrary code in the context of the Local System Account.

The Microsoft security advisory is available at: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11779

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 Microsoft.

2020-08-12 V1.1 UPDATED Updated the "Software Versions and Fixes" section;

2017-12-20 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.

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