CVE-2019-9503 — Improper Input Validation in Brcmfmac Wifi Driver

CWE-20 — Improper Input ValidationCWE-358 — Improperly Implemented Security Check for StandardCWE-300 — Channel Accessible by Non-EndpointCWE-122 — Heap-based Buffer OverflowCWE-787 — Out-of-bounds WriteCWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition29 documents8 sources
Severity
8.3HIGHNVD
NVD3.1OSV8.1OSV5.6
EPSS
0.5%
top 33.39%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
7
Linux KernelApple IpadosApple Iphone OS+4 more
Timeline
PublishedJan 16
Latest updateOct 1

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 …

CVSS vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HExploitability: 1.6 | Impact: 6.0

Affected Packages8 packages

▶CVEListV5broadcom/brcmfmac_wifi_drivercommit prior to 1b5e2423164b3670e8bc9174e4762d297990deff, commit prior to a4176ec356c73a46c07c181c6d04039fafa34a9f+1
▶NVDapple/ipados< 13.2
▶debiandebian/linux< linux 4.19.37-4 (bookworm)
▶NVDapple/mac_os_x< 10.15.1
▶NVDapple/iphone_os< 13.2

Also affects: Enterprise Linux 6.0, 7.0

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

9
GHSA
GHSA-p2g8-8j8x-3728: An issue was discovered on Broadcom Wi-Fi client devices↗2022-05-24
▶
GHSA
GHSA-6g85-84jx-q393: The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d04039fafa34a9f is vulnerable to a frame validation bypass↗2022-05-24
▶
GHSA
GHSA-6jhq-h73f-x439: The Broadcom brcmfmac WiFi driver prior to commit 1b5e2423164b3670e8bc9174e4762d297990deff is vulnerable to a heap buffer overflow↗2022-05-24
▶
OSV
CVE-2019-9500: The Broadcom brcmfmac WiFi driver prior to commit 1b5e2423164b3670e8bc9174e4762d297990deff is vulnerable to a heap buffer overflow↗2020-01-16
▶
OSV
CVE-2019-9503: The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d04039fafa34a9f is vulnerable to a frame validation bypass↗2020-01-16
▶

📋Vendor Advisories

12
Red Hat
linux-firmware: Transmission of data encrypted with an all-zero session key after disassociation↗2020-02-05
▶
Ubuntu
Linux kernel vulnerabilities↗2019-08-13
▶
Ubuntu
Linux kernel vulnerabilities↗2019-07-25
▶
Ubuntu
Linux kernel (HWE) vulnerabilities↗2019-05-15
▶
Ubuntu
Linux kernel vulnerabilities↗2019-05-14
▶

📄Research Papers

1
arXiv
Streamlining Attack Tree Generation: A Fragment-Based Approach↗2023-10-01
▶

💬Community

4
Bugzilla
CVE-2019-15126 linux-firmware: Transmission of data encrypted with an all-zero session key after disassociation↗2020-02-27
▶
Bugzilla
CVE-2019-9503 kernel: brcmfmac frame validation bypass↗2019-04-22
▶
Bugzilla
CVE-2019-9503 kernel: brcmfmac frame validation bypass [fedora-all]↗2019-04-22
▶
Bugzilla
CVE-2019-9500 kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results↗2019-04-18
▶