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AUSCERT External Security Bulletin Redistribution
ESB-2019.3686
kpatch-patch security update
2 October 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: kpatch-patch
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-9503 CVE-2019-9500
Reference: ESB-2019.3460
ESB-2019.3436
Original Bulletin:
https://access.redhat.com/errata/RHSA-2019:2945
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Red Hat Security Advisory
Synopsis: Important: kpatch-patch security update
Advisory ID: RHSA-2019:2945-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2945
Issue date: 2019-10-01
CVE Names: CVE-2019-9500
=====================================================================
1. Summary:
An update for kpatch-patch is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Server (v. 7) - ppc64le, x86_64
3. Description:
This is a kernel live patch module which is automatically loaded by the RPM
post-install script to modify the code of a running kernel.
Security fix(es):
* 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 a 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 (CVE-2019-9503), 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. (CVE-2019-9500)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgements, and other related information, refer to the CVE
page(s) listed in the References section.
4. Solution:
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
5. Bugs fixed (https://bugzilla.redhat.com/):
1701224 - CVE-2019-9500 kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results
6. Package List:
Red Hat Enterprise Linux Server (v. 7):
Source:
kpatch-patch-3_10_0-1062-1-2.el7.src.rpm
ppc64le:
kpatch-patch-3_10_0-1062-1-2.el7.ppc64le.rpm
kpatch-patch-3_10_0-1062-debuginfo-1-2.el7.ppc64le.rpm
x86_64:
kpatch-patch-3_10_0-1062-1-2.el7.x86_64.rpm
kpatch-patch-3_10_0-1062-debuginfo-1-2.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2019-9500
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2019 Red Hat, Inc.
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