CVE-2019-9500: Broadcom brcmfmac driver is vulnerable to a heap buffer overflow
First published: Tue Feb 19 2019(Updated: )
If the Wake-up on Wireless LAN functionality is configured in the brcmfmac driver which only works with Broadcom FullMAC chipsets, 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 by compromised chipsets to compromise the host, or when used in combination with another brcmfmac driver flaw (<a href="https://access.redhat.com/security/cve/CVE-2019-9503">CVE-2019-9503</a>), can be used remotely. This can result in a remote denial of service (DoS). Due to the nature of the flaw, a remote privilege escalation cannot be fully ruled out, although we believe it is unlikely. Introduced in: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3021ad9a4f009265e6063e617fb91306980af16c">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3021ad9a4f009265e6063e617fb91306980af16c</a> An upstream patch: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1b5e2423164b3670e8bc9174e4762d297990deff">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1b5e2423164b3670e8bc9174e4762d297990deff</a> External References: <a href="https://kb.cert.org/vuls/id/166939/">https://kb.cert.org/vuls/id/166939/</a> <a href="https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html#cve-2019-9500-heap-buffer-overflow-in-brcmf-wowl-nd-results">https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html#cve-2019-9500-heap-buffer-overflow-in-brcmf-wowl-nd-results</a> <a href="https://www.bleepingcomputer.com/news/security/broadcom-wifi-driver-flaws-expose-computers-phones-iot-to-rce-attacks/">https://www.bleepingcomputer.com/news/security/broadcom-wifi-driver-flaws-expose-computers-phones-iot-to-rce-attacks/</a>
Credit: cret@cert.org cret@cert.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1062.1.1.rt56.1024.el7 | 0:3.10.0-1062.1.1.rt56.1024.el7 |
| redhat/kernel | <0:3.10.0-1062.1.1.el7 | 0:3.10.0-1062.1.1.el7 |
| redhat/kernel-alt | <0:4.14.0-115.14.1.el7a | 0:4.14.0-115.14.1.el7a |
| redhat/kernel | <0:3.10.0-957.41.1.el7 | 0:3.10.0-957.41.1.el7 |
| redhat/kernel-rt | <0:4.18.0-80.11.1.rt9.156.el8_0 | 0:4.18.0-80.11.1.rt9.156.el8_0 |
| redhat/kernel | <0:4.18.0-80.11.1.el8_0 | 0:4.18.0-80.11.1.el8_0 |
| Broadcom brcmfmac driver | ||
| Linux Linux kernel | >=4.5<4.9.181 | |
| Linux Linux kernel | >=4.10<4.14.123 | |
| Linux Linux kernel | >=4.15<4.19.47 | |
| Linux Linux kernel | >=4.20<5.0.20 | |
| debian/linux | 5.10.223-1 6.1.106-3 6.1.99-1 6.10.9-1 |
Remedy
https://git.kernel.org/linus/1b5e2423164b3670e8bc9174e4762d297990deff
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.cve.org/CVERecord?id=CVE-2019-9500 https://nvd.nist.gov/vuln/detail/CVE-2019-9500 https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html#cve-2019-9500-heap-buffer-overflow-in-brcmf-wowl-nd-results https://kb.cert.org/vuls/id/166939/ https://www.bleepingcomputer.com/news/security/broadcom-wifi-driver-flaws-expose-computers-phones-iot-to-rce-attacks/
- https://bugzilla.redhat.com/show_bug.cgi?id=1701224
- https://access.redhat.com/errata/RHSA-2019:2609
- https://access.redhat.com/errata/RHSA-2019:2600
- https://access.redhat.com/errata/RHSA-2019:2945
- https://access.redhat.com/errata/RHSA-2019:3217
- https://access.redhat.com/errata/RHSA-2019:4168
- https://access.redhat.com/errata/RHSA-2019:4171
- https://access.redhat.com/errata/RHSA-2019:2741
- https://access.redhat.com/errata/RHSA-2019:2703
- https://access.redhat.com/security/cve/cve-2019-9500
- https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html
- https://git.kernel.org/linus/1b5e2423164b3670e8bc9174e4762d297990deff
- https://kb.cert.org/vuls/id/166939/
- https://launchpad.net/bugs/cve/CVE-2019-9500
- https://access.redhat.com/security/cve/CVE-2019-9503
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3021ad9a4f009265e6063e617fb91306980af16c
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1b5e2423164b3670e8bc9174e4762d297990deff
- https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html#cve-2019-9500-heap-buffer-overflow-in-brcmf-wowl-nd-results
- https://www.bleepingcomputer.com/news/security/broadcom-wifi-driver-flaws-expose-computers-phones-iot-to-rce-attacks/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1701225
- https://security-tracker.debian.org/tracker/CVE-2019-9500
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9500
- https://nvd.nist.gov/vuln/detail/CVE-2019-9500
- https://ubuntu.com/security/CVE-2019-9500
Parent vulnerabilities
(Appears in the following advisories)
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2019-9500
- agent/author
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/bleeping-computer
- source/BleepingComputer
- alias/CVE-2019-8564
- alias/CVE-2019-9501
- alias/CVE-2019-9502
- alias/CVE-2019-9503
- agent/weakness
- agent/news-ai
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/title
- agent/last-modified-date
- collector/usn-cve
- source/Ubuntu
- collector/security-tracker-debian
- source/Debian
- agent/remedy
- agent/references
- agent/softwarecombine
- agent/tags
- agent/description
- agent/event
- package-manager/redhat
- vendor/broadcom
- canonical/broadcom brcmfmac driver
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/4.5
- version/linux linux kernel/4.10
- version/linux linux kernel/4.15
- version/linux linux kernel/4.20
- package-manager/debian