Buffer overflow in Broadcom Bcm4339
CVE-2019-9502
The Broadcom wl WiFi driver is vulnerable to a heap buffer overflow. If the vendor information element data length is larger than 164 bytes, a heap buffer overflow is triggered in wlc_wpa_plumb_gtk. 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: 0.026 (85.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Broadcom Bcm4339
- Broadcom Bcm4339 Firmware
- Broadcom Wifi Drivers — versions wl
- Synology Router Manager — versions 1.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html (Third Party Advisory)
- kb.cert.org/vuls/id/166939/ (US Government Resource, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9502?
- CVE-2019-9502 is a high-severity vulnerability in Broadcom Bcm4339, classified under Heap-based Buffer Overflow. CVSS score: 7.9/10. Published 2020-02-03.
- How severe is CVE-2019-9502?
- High severity. CVSS v3 base score is 7.9 out of 10.
- Is CVE-2019-9502 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.