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Security Advisory - Two Heap Buffer Overflow Vulnerabilities in Broadcom WiFi Chipset Drivers

  • SA No:huawei-sa-20191030-01-broadcom
  • Initial Release Date: Oct 30, 2019
  • Last Release Date: Oct 30, 2019

There are two heap buffer overflow vulnerabilities in Broadcom WiFi chipset drivers. A remote, unauthenticated attacker may send specially-crafted WiFi packets to exploit these vulnerabilities. Successfully exploit may cause Wi-Fi functions abnormal. (Vulnerability ID: HWPSIRT-2019-04121 and HWPSIRT-2019-04122)


The two vulnerabilities have been assigned two Common Vulnerabilities and Exposures (CVE) IDs: CVE-2019-9501 and CVE-2019-9502.



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

Product Name

Affected Version

Resolved Product and Version


Versions earlier than

Attackers can exploit these vulnerabilities to make Wi-Fi functions abnormal.

The vulnerability classification has been performed by using the CVSSv3 scoring system (

Base Score: 6.5 (AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Temporal Score: 6.0 (E:F/RL:O/RC:C)

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

The attacker could gain access to the affected network.

Vulnerability details:

The vulnerabilities can be triggered in the client when parsing an EAPOL message 3 during the 4-way handshake from the access point (AP). Successfully exploit may cause Wi-Fi functions abnormal.

The product that supports automatic update will receive a system update prompt. You can install the update to fix the vulnerability.

These vulnerabilities were disclosed by public.

2019-10-30 V1.0 INITIAL

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