Operating System:

[RedHat]

Published:

12 September 2019

Protect yourself against future threats.

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

                               ESB-2019.3460
             Important: kernel-rt security and bug fix update
                             12 September 2019

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           kernel-rt
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 8
                   Red Hat Enterprise Linux WS/Desktop 8
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote/Unauthenticated      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-11487 CVE-2019-9503 CVE-2019-9500
                   CVE-2019-3887 CVE-2019-3846 

Reference:         ESB-2019.3436
                   ESB-2019.3341
                   ESB-2019.3338
                   ESB-2019.3335
                   ESB-2019.3334

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2019:2741

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2019:2741-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:2741
Issue date:        2019-09-11
CVE Names:         CVE-2019-3846 CVE-2019-3887 CVE-2019-9500 
                   CVE-2019-9503 CVE-2019-11487 
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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 Real Time (v. 8) - x86_64
Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables
fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: Heap overflow in mwifiex_update_bss_desc_with_ie function in
marvell/mwifiex/scan.c (CVE-2019-3846)

* Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS
(CVE-2019-3887)

* kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results
(CVE-2019-9500)

* kernel: Count overflow in FUSE request leading to use-after-free issues.
(CVE-2019-11487)

* kernel: brcmfmac frame validation bypass (CVE-2019-9503)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

Bug Fix(es):

* BUG: scheduling while atomic in zswap (BZ#1726362)

* kernel-rt: update to the RHEL8.0.z batch#3 source tree (BZ#1734475)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1695044 - CVE-2019-3887 Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS
1701224 - CVE-2019-9500 kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results
1701842 - CVE-2019-9503 kernel: brcmfmac frame validation bypass
1703063 - CVE-2019-11487 kernel: Count overflow in FUSE request leading to use-after-free issues.
1713059 - CVE-2019-3846 kernel: Heap overflow in mwifiex_update_bss_desc_with_ie function in marvell/mwifiex/scan.c
1726362 - BUG: scheduling while atomic in zswap [rhel-8.0.0.z]
1734475 - kernel-rt: update to the RHEL8.0.z batch#3 source tree

6. Package List:

Red Hat Enterprise Linux Real Time for NFV (v. 8):

Source:
kernel-rt-4.18.0-80.11.1.rt9.156.el8_0.src.rpm

x86_64:
kernel-rt-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-core-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-core-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-devel-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-modules-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-devel-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-kvm-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-kvm-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-modules-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-modules-extra-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm

Red Hat Enterprise Linux Real Time (v. 8):

Source:
kernel-rt-4.18.0-80.11.1.rt9.156.el8_0.src.rpm

x86_64:
kernel-rt-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-core-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-core-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-devel-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-modules-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-devel-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-kvm-debuginfo-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-modules-4.18.0-80.11.1.rt9.156.el8_0.x86_64.rpm
kernel-rt-modules-extra-4.18.0-80.11.1.rt9.156.el8_0.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-2019-3846
https://access.redhat.com/security/cve/CVE-2019-3887
https://access.redhat.com/security/cve/CVE-2019-9500
https://access.redhat.com/security/cve/CVE-2019-9503
https://access.redhat.com/security/cve/CVE-2019-11487
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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