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Security Advisory - Multiple Vulnerabilities in the X.509 Implementation in Some Huawei Products

  • SA No:huawei-sa-20191225-01-eudemon
  • Initial Release Date: Dec 26, 2019
  • Last Release Date: Dec 26, 2019

There is a denial of service vulnerability in some Huawei products. Due to a flaw in the X.509 implementation in the affected products which can result in a heap buffer overflow when decoding a certificate, an attacker may exploit the vulnerability by a malicious certificate to perform a denial of service attack on the affected products. (Vulnerability ID: HWPSIRT-2018-12392)

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2019-5275.

There is a denial of service vulnerability in some Huawei products. Due to a flaw in the X.509 implementation in the affected products which can result in an infinite loop, an attacker may exploit the vulnerability via a malicious certificate to perform a denial of service attack on the affected products. (Vulnerability ID: HWPSIRT-2018-12394)

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2019-5274.

There is a denial of service vulnerability in some Huawei products. Due to a flaw in the X.509 implementation in the affected products which can result in a large heap buffer overrun error, an attacker may exploit the vulnerability by a malicious certificate, resulting a denial of service on the affected products. (Vulnerability ID: HWPSIRT-2018-12396)

This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2019-5273.

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

http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-eudemon-en


Product Name

Affected Version

Resolved Product and Version

USG9500

V500R001C30

Upgrade to V500R005C00SPC200

V500R001C60


Successful exploit may result in denial of service on the affected products.


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

HWPSIRT-2018-12392,HWPSIRT-2018-12394 and HWPSIRT-2018-12396:

Base Score: 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Temporal Score: 7.0 (E:F/RL:O/RC:C)


Technique Details

HWPSIRT-2018-12392:

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

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

Vulnerability details:

There is a denial of service vulnerability in some Huawei products. Due to a flaw in the X.509 implementation in the affected products which can result in a heap buffer overflow when decoding a certificate, an attacker may exploit the vulnerability by a malicious certificate to perform a denial of service attack on the affected products.

HWPSIRT-2018-12394:

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

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

Vulnerability details:

There is a denial of service vulnerability in some Huawei products. Due to a flaw in the X.509 implementation in the affected products which can result in an infinite loop, an attacker may exploit the vulnerability via a malicious certificate to perform a denial of service attack on the affected products.

HWPSIRT-2018-12396:

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

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

Vulnerability details:

There is a denial of service vulnerability in some Huawei products. Due to a flaw in the X.509 implementation in the affected products which can result in a large heap buffer overrun error, an attacker may exploit the vulnerability by a malicious certificate, resulting a denial of service on the affected products.


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.

These vulnerabilities were discovered by Huawei internal testers.


2019-12-26 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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