Protect yourself against future threats.
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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.4031
kernel security, kernel-rt and bug fix updates
1 December 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
kernel-rt
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20317 CVE-2020-36385
Reference: ESB-2021.3895
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:4871
https://access.redhat.com/errata/RHSA-2021:4875
Comment: This bulletin contains two (2) Red Hat security advisories.
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2021:4871-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4871
Issue date: 2021-11-30
CVE Names: CVE-2020-36385 CVE-2021-20317
=====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 8.2
Extended Update Support.
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 CodeReady Linux Builder EUS (v. 8.2) - aarch64, ppc64le, x86_64
Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - aarch64, noarch, ppc64le, s390x, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* kernel: use-after-free in drivers/infiniband/core/ucma.c ctx
use-after-free (CVE-2020-36385)
* kernel: timer tree corruption leads to missing wakeup and system freeze
(CVE-2021-20317)
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):
* [IBM 8.4] [P10] P10 hardware counter (performance counters/perf:) support
(BZ#1994075)
* RHEL8.1 Snapshot1 - [4.18.0-128.el8.ppc64le] [ Brazos 31TB/192 Core ]
While running upstream kernel selftest case system crashed (TM)
(BZ#1996057)
* [kernel-debug] WARNING: possible circular locking dependency detected
(module_mutex & text_mutex) (BZ#2013777)
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/):
1974319 - CVE-2020-36385 kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free
2005258 - CVE-2021-20317 kernel: timer tree corruption leads to missing wakeup and system freeze
6. Package List:
Red Hat Enterprise Linux BaseOS EUS (v. 8.2):
Source:
kernel-4.18.0-193.70.1.el8_2.src.rpm
aarch64:
bpftool-4.18.0-193.70.1.el8_2.aarch64.rpm
bpftool-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-core-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-cross-headers-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debug-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debug-core-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debug-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debug-devel-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debug-modules-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debug-modules-extra-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-devel-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-headers-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-modules-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-modules-extra-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-tools-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-tools-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-tools-libs-4.18.0-193.70.1.el8_2.aarch64.rpm
perf-4.18.0-193.70.1.el8_2.aarch64.rpm
perf-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
python3-perf-4.18.0-193.70.1.el8_2.aarch64.rpm
python3-perf-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
noarch:
kernel-abi-whitelists-4.18.0-193.70.1.el8_2.noarch.rpm
kernel-doc-4.18.0-193.70.1.el8_2.noarch.rpm
ppc64le:
bpftool-4.18.0-193.70.1.el8_2.ppc64le.rpm
bpftool-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-core-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-cross-headers-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debug-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debug-core-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debug-devel-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debug-modules-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-devel-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-headers-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-modules-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-modules-extra-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-tools-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-tools-libs-4.18.0-193.70.1.el8_2.ppc64le.rpm
perf-4.18.0-193.70.1.el8_2.ppc64le.rpm
perf-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
python3-perf-4.18.0-193.70.1.el8_2.ppc64le.rpm
python3-perf-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
s390x:
bpftool-4.18.0-193.70.1.el8_2.s390x.rpm
bpftool-debuginfo-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-core-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-cross-headers-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-debug-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-debug-core-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-debug-debuginfo-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-debug-devel-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-debug-modules-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-debug-modules-extra-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-debuginfo-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-devel-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-headers-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-modules-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-modules-extra-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-tools-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-tools-debuginfo-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-zfcpdump-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-zfcpdump-core-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-zfcpdump-devel-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-zfcpdump-modules-4.18.0-193.70.1.el8_2.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-193.70.1.el8_2.s390x.rpm
perf-4.18.0-193.70.1.el8_2.s390x.rpm
perf-debuginfo-4.18.0-193.70.1.el8_2.s390x.rpm
python3-perf-4.18.0-193.70.1.el8_2.s390x.rpm
python3-perf-debuginfo-4.18.0-193.70.1.el8_2.s390x.rpm
x86_64:
bpftool-4.18.0-193.70.1.el8_2.x86_64.rpm
bpftool-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-core-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-cross-headers-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debug-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debug-core-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debug-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debug-devel-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debug-modules-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debug-modules-extra-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-devel-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-headers-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-modules-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-modules-extra-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-tools-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-tools-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-tools-libs-4.18.0-193.70.1.el8_2.x86_64.rpm
perf-4.18.0-193.70.1.el8_2.x86_64.rpm
perf-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
python3-perf-4.18.0-193.70.1.el8_2.x86_64.rpm
python3-perf-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
Red Hat CodeReady Linux Builder EUS (v. 8.2):
aarch64:
bpftool-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debug-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-tools-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
kernel-tools-libs-devel-4.18.0-193.70.1.el8_2.aarch64.rpm
perf-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
python3-perf-debuginfo-4.18.0-193.70.1.el8_2.aarch64.rpm
ppc64le:
bpftool-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-193.70.1.el8_2.ppc64le.rpm
perf-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
python3-perf-debuginfo-4.18.0-193.70.1.el8_2.ppc64le.rpm
x86_64:
bpftool-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debug-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-tools-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
kernel-tools-libs-devel-4.18.0-193.70.1.el8_2.x86_64.rpm
perf-debuginfo-4.18.0-193.70.1.el8_2.x86_64.rpm
python3-perf-debuginfo-4.18.0-193.70.1.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-2020-36385
https://access.redhat.com/security/cve/CVE-2021-20317
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 2021 Red Hat, Inc.
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Hash: SHA256
=====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2021:4875-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4875
Issue date: 2021-11-30
CVE Names: CVE-2020-36385 CVE-2021-20317
=====================================================================
1. Summary:
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2
Extended Update Support.
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 EUS (v. 8.2) - x86_64
Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) - 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 drivers/infiniband/core/ucma.c ctx
use-after-free (CVE-2020-36385)
* kernel: timer tree corruption leads to missing wakeup and system freeze
(CVE-2021-20317)
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 latest RHEL-8.2.z13 Batch source
tree (BZ#2020969)
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/):
1974319 - CVE-2020-36385 kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free
2005258 - CVE-2021-20317 kernel: timer tree corruption leads to missing wakeup and system freeze
6. Package List:
Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2):
Source:
kernel-rt-4.18.0-193.70.1.rt13.120.el8_2.src.rpm
x86_64:
kernel-rt-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-kvm-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
Red Hat Enterprise Linux Real Time EUS (v. 8.2):
Source:
kernel-rt-4.18.0-193.70.1.rt13.120.el8_2.src.rpm
x86_64:
kernel-rt-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.70.1.rt13.120.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.70.1.rt13.120.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-2020-36385
https://access.redhat.com/security/cve/CVE-2021-20317
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 2021 Red Hat, Inc.
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
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===========================================================================
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