Operating System:

[RedHat]

Published:

02 October 2019

Protect yourself against future threats.

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.3686
                       kpatch-patch security update
                              2 October 2019

===========================================================================

        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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