CVE-2019-9503
Broadcom brcmfmac driver is vulnerable to a frame validation bypass
At a glance
- Severity
- HIGH 7.9
- EPSS
- EPSS 3.29 % · percentile 88 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- certcc
- NVD status
- Modified
Description
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. This frame validation can be bypassed if the bus used is USB (for instance by a wifi dongle). This can allow firmware event frames from a remote source to be processed. 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.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.9 | CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H | certcc |
| CVSS 3.1 | HIGH 7.9 | CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H | NVD · cret@cert.org (Secondary) |
| CVSS 3.1 | HIGH 8.3 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | HIGH 7.9 | AV:A/AC:M/Au:N/C:C/I:C/A:C | NVD · nvd@nist.gov (Primary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2019-18877
- GCVE · GCVE-0-2019-9503
CERT-FR advisories
- CERTFR-2022-AVI-267 — Multiples vulnérabilités dans Juniper Networks Junos Space · cert.ssi.gouv.fr
- CERTFR-2020-AVI-369 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2020-AVI-180 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2019-AVI-458 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2019-AVI-440 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2019-AVI-428 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2019-AVI-391 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2019-AVI-281 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2019-AVI-277 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2019-AVI-233 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2019-AVI-212 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2019-AVI-211 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:broadcom:brcmfmac_driver:-:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Broadcom · brcmfmac WiFi driver | affected commit prior to a4176ec356c73a46c07c181c6d04039fafa34a9f |
References
- https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html
- https://kb.cert.org/vuls/id/166939/
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4176ec356c73a46c07c181c6d04039fafa34a9f
- https://bugzilla.redhat.com/show_bug.cgi?id=1701842
- https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-9503.html
- https://bugzilla.suse.com/show_bug.cgi?id=1132828
- https://security-tracker.debian.org/tracker/CVE-2019-9503
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |