Improper Input Validation Affecting kernel package, versions <0:4.18.0-80.11.1.el8_0
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Test your applications- Snyk ID SNYK-CENTOS8-KERNEL-1990951
- published 26 Jul 2021
- disclosed 19 Feb 2019
Introduced: 19 Feb 2019
CVE-2019-9503 Open this link in a new tabHow to fix?
Upgrade Centos:8 kernel to version 0:4.18.0-80.11.1.el8_0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2019-9503
- https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4176ec356c73a46c07c181c6d04039fafa34a9f
- https://kb.cert.org/vuls/id/166939/
- https://access.redhat.com/errata/RHSA-2019:2703
- https://bugzilla.redhat.com/show_bug.cgi?id=1701842
- https://bugzilla.suse.com/show_bug.cgi?id=1132828
- https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-9503.html
- https://security-tracker.debian.org/tracker/CVE-2019-9503