CVE-2019-9503

Advisory lineage Upstream: 0 Downstream: 26
Modified
Published: 16 Jan 2020, 20:35
Last modified:04 Aug 2024, 21:54

Vulnerability Summary

Overall Risk (default)
medium
33/100
CVSS Score
8.3 HIGH
v3.1 (nvd)
EPSS Score
0.51% LOW
1% probability -0.31%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

16 Jan 2020, 20:35
Published
Vulnerability first disclosed
04 Aug 2024, 21:54
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.9CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
  • v3.1•HIGH•Score: 8.3CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
  • v2.0•HIGH•Score: 7.9AV:A/AC:M/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.51%• Percentile: 67%

Techniques & Countermeasures

  • CWE-20•Improper Input Validation

    The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected Systems

  • broadcom•brcmfmac_driver

    na

  • broadcom•brcmfmac wifi driver

    commit prior to a4176ec356c73a46c07c181c6d04039fafa34a9f

  • redhat•enterprise_linux

    6.0 | 7.0

References (7)