Buffer overflow in Broadcom Brcmfmac Driver
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.039 (89.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000
Affected products
- Broadcom Brcmfmac Driver
- Broadcom Brcmfmac Wifi Driver — versions commit prior to 1b5e2423164b3670e8bc9174e4762d297990deff
- Linux Kernel
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html (Exploit, Third Party Advisory)
- kb.cert.org/vuls/id/166939/ (US Government Resource, Third Party Advisory)
- git.kernel.org/linus/1b5e2423164b3670e8bc9174e4762d297990deff (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9500?
- CVE-2019-9500 is a high-severity vulnerability in Broadcom Brcmfmac Driver, classified under Heap-based Buffer Overflow. CVSS score: 7.9/10. Published 2020-01-16.
- How severe is CVE-2019-9500?
- High severity. CVSS v3 base score is 7.9 out of 10.
- Is CVE-2019-9500 known to be exploited?
- 21 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.