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.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-1799-1 linux security update
Debian DLA Debian DLA DLA-1799-2 linux security update
Debian DLA Debian DLA DLA-1824-1 linux-4.9 security update
Debian DSA Debian DSA DSA-4465-1 linux security update
EUVD EUVD EUVD-2019-18877 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.
Ubuntu USN Ubuntu USN USN-3979-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-3980-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-3980-2 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-3981-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-3981-2 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-4076-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4095-1 Linux kernel vulnerabilities
Fixes

Solution

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4176ec356c73a46c07c181c6d04039fafa34a9f


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2024-08-04T21:54:44.111Z

Reserved: 2019-03-01T00:00:00

Link: CVE-2019-9503

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-01-16T21:15:12.117

Modified: 2024-11-21T04:51:44.843

Link: CVE-2019-9503

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-02-19T00:00:00Z

Links: CVE-2019-9503 - Bugzilla

cve-icon OpenCVE Enrichment

No data.