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CVE-2019-9500

HIGHCVSS 8.3/10EPSS 3.84%

Last modified

CVE-2019-9500 is a high-severity vulnerability rated 8.3/10 on the CVSS scale. 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. EPSS estimates a 3.84% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.3/10

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
3.84%

88.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
BroadcomBrcmfmac DriverAll versions
LinuxLinux Kernel>= 4.5, < 4.9.181
LinuxLinux Kernel>= 4.10, < 4.14.123
LinuxLinux Kernel>= 4.15, < 4.19.47
LinuxLinux Kernel>= 4.20, < 5.0.20

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-9500?
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.
How severe is CVE-2019-9500?
CVE-2019-9500 has a CVSS score of 8.3/10 (HIGH severity). The EPSS model estimates a 3.84% probability of exploitation in the next 30 days.
How do I fix CVE-2019-9500?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-9500?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST