Vulnerability CVE-2019-9500


Published: 2020-01-16   Modified: 2020-01-17

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.

Type:

CWE-787

CVSS2 => (AV:A/AC:M/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.9/10
10/10
5.5/10
Exploit range
Attack complexity
Authentication
Adjacent network
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Broadcom -> Brcmfmac driver 

 References:
https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html
https://git.kernel.org/linus/1b5e2423164b3670e8bc9174e4762d297990deff
https://kb.cert.org/vuls/id/166939/

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