SARA / Free Tools / CVE / CVE-2019-9503

CVE-2019-9503 — The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d0403

The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d04039fafa34a9f is vulnerable to a frame validation bypass. If the brcmfmac driver receives a firmware event frame from a remote source, the is_wlc_event_frame function will cause this frame to be discarde

CVSS
7.9 HIGH
EPSS
0.82% (top 25.80%)
CWE
CWE-20
Published
2020-01-16T20:35:18.000Z
Last modified
2024-08-04T21:54:44.111Z
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

01What is this vulnerability?

The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d04039fafa34a9f is vulnerable to a frame validation bypass. If the brcmfmac driver receives a firmware event frame from a remote source, the is_wlc_event_frame function will cause this frame to be discarded and unprocessed. If the driver receives the firmware event frame from the host, the appropriate handler is called…

02Affected products

VendorProductVersions
Broadcombrcmfmac WiFi drivercommit prior to a4176ec356c73a46c07c181c6d04039fafa34a9f

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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