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Red Hat Security Advisory 2020-3016-01

Red Hat Security Advisory 2020-3016-01
Posted Jul 21, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3016-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include buffer overflow, denial of service, information leakage, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-19807, CVE-2019-3016, CVE-2020-10757, CVE-2020-10766, CVE-2020-10767, CVE-2020-10768, CVE-2020-12653, CVE-2020-12654, CVE-2020-12888
MD5 | d097defef959edd4754677e446ea8818

Red Hat Security Advisory 2020-3016-01

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

Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2020:3016-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3016
Issue date: 2020-07-21
CVE Names: CVE-2019-3016 CVE-2019-19807 CVE-2020-10757
CVE-2020-10766 CVE-2020-10767 CVE-2020-10768
CVE-2020-12653 CVE-2020-12654 CVE-2020-12888
====================================================================
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: use-after-free in sound/core/timer.c (CVE-2019-19807)

* kernel: kernel: DAX hugepages not considered during mremap
(CVE-2020-10757)

* kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug
allows an attacker to turn off the SSBD protection. (CVE-2020-10766)

* kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP
is unavailable or enhanced IBRS is available. (CVE-2020-10767)

* kernel: Indirect branch speculation can be enabled after it was
force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)

* kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in
drivers/net/wireless/marvell/mwifiex/scan.c (CVE-2020-12653)

* kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function
in drivers/net/wireless/marvell/mwifiex/wmm.c (CVE-2020-12654)

* Kernel: vfio: access to disabled MMIO space of some devices may lead to
DoS scenario (CVE-2020-12888)

* kernel: kvm: Information leak within a KVM guest (CVE-2019-3016)

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):

* kernel-rt: update RT source tree to the RHEL-8.2.z2 source tree
(BZ#1829582)

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/):

1786078 - CVE-2019-19807 kernel: use-after-free in sound/core/timer.c
1792167 - CVE-2019-3016 kernel: kvm: Information leak within a KVM guest
1831868 - CVE-2020-12653 kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c
1832530 - CVE-2020-12654 kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c
1836244 - CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario
1842525 - CVE-2020-10757 kernel: kernel: DAX hugepages not considered during mremap
1845840 - CVE-2020-10766 kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection.
1845867 - CVE-2020-10767 kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available.
1845868 - CVE-2020-10768 kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command.

6. Package List:

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

Source:
kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.src.rpm

x86_64:
kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-kvm-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm

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

Source:
kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.src.rpm

x86_64:
kernel-rt-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.13.2.rt13.65.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.13.2.rt13.65.el8_2.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-2019-3016
https://access.redhat.com/security/cve/CVE-2019-19807
https://access.redhat.com/security/cve/CVE-2020-10757
https://access.redhat.com/security/cve/CVE-2020-10766
https://access.redhat.com/security/cve/CVE-2020-10767
https://access.redhat.com/security/cve/CVE-2020-10768
https://access.redhat.com/security/cve/CVE-2020-12653
https://access.redhat.com/security/cve/CVE-2020-12654
https://access.redhat.com/security/cve/CVE-2020-12888
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 2020 Red Hat, Inc.
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