CVE-2019-9500 Detail

Current Description

The Broadcom brcmfmac WiFi driver prior to commit 1b5e2423164b3670e8bc9174e4762d297990deff is vulnerable to a heap buffer overflow. If the Wake-up on Wireless LAN functionality is configured, a malicious event frame can be constructed to trigger an heap buffer overflow in the brcmf_wowl_nd_results function. This vulnerability can be exploited with compromised chipsets to compromise the host, or when used in combination with CVE-2019-9503, can be used remotely. In the worst case scenario, by sending specially-crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  8.3 HIGH
Vector:  CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Nist CVSS score does not match with CNA score
CNA:  CERT/CC
Base Score:  7.9 HIGH
Vector:  CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

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Hyperlink Resource
https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html Exploit  Third Party Advisory 
https://git.kernel.org/linus/1b5e2423164b3670e8bc9174e4762d297990deff Patch  Third Party Advisory 
https://kb.cert.org/vuls/id/166939/ Third Party Advisory  US Government Resource 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write cwe source acceptance level NIST  
CWE-122 Heap-based Buffer Overflow Reference acceptance level CERT/CC  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-9500
NVD Published Date:
01/16/2020
NVD Last Modified:
01/29/2020
Source:
MITRE