Protect yourself against future threats.
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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2020.1668
kernel security and bug fix update
13 May 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Root Compromise -- Existing Account
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-10711 CVE-2019-19768 CVE-2017-18595
Reference: ESB-2020.1531
ESB-2020.1520
ESB-2020.1480
ESB-2020.1476
ESB-2020.1475
ESB-2020.1474
ESB-2020.1472
ESB-2020.1462
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:2082
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2020:2082-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2082
Issue date: 2020-05-12
CVE Names: CVE-2017-18595 CVE-2019-19768 CVE-2020-10711
=====================================================================
1. Summary:
An update for kernel 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 Client (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* kernel: double free may be caused by the function allocate_trace_buffer
in the file kernel/trace/trace.c (CVE-2017-18595)
* kernel: use-after-free in __blk_add_trace in kernel/trace/blktrace.c
(CVE-2019-19768)
* Kernel: NetLabel: null pointer dereference while receiving CIPSO packet
with null category may cause kernel panic (CVE-2020-10711)
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):
* Delay in RT task scheduled. Incorrect nr_scheduled value. (BZ#1796262)
* ixgbevf interface goes down on hypervisor and causes outage (BZ#1796799)
* kernel: UAF in cdev_put() when a PTP device is removed while its chardev
is open (BZ#1798396)
* [HPEMC RHEL 7.7 RHEL 7.8 REGRESSION] kernel not populating numa_nod in
/sys/devices... for PMEM (BZ#1801699)
* Unable to exclude files from auditing (BZ#1806430)
* DNAT'd packet is not unmangled upon reply on openshift node (BZ#1806447)
* top shows super high loads when tuned profile realtime-virtual-host is
applied (BZ#1808030)
* [RHEL 7.9] mdraid devices do not autocorrect read errors on parity blocks
(BZ#1810062)
* Observed a memory leak while using dm-multipath (BZ#1812937)
* RHEL7.8: megaraid_sas: MSIx allocation fails in resume path (BZ#1813249)
* Backport: Guest microcode version mismatch on secondary processors
(BZ#1814003)
* dm-multipath high load backport incorrect (BZ#1814537)
* qla2xxx: Urgent driver fix needed. Initiator does not relogin to target
after receiving an explicit logout (BZ#1815596)
* Potential deadlock in iscsi_if_rx func (BZ#1817497)
* High iSCSI read latency resolved by 'tcp: implement coalescing on backlog
queue' (BZ#1817499)
* kdump: crashkernel=xM,low is likely to fail when x is big enough
(BZ#1817502)
* [RHEL7.8][Azure]Commits to resolve high network latency (BZ#1817935)
* net_sched: remove a bogus warning in hfsc (BZ#1821262)
* NETDEV WATCHDOG: enp3s0 (r8169): transmit queue 0 timed out (BZ#1822548)
* BUG: unable to handle kernel NULL pointer dereference at fl_dump
(BZ#1824548)
* [ Marvell 7.9] update qla2xxx driver with critical bug fixes (BZ#1827274)
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/):
1758671 - CVE-2017-18595 kernel: double free may be caused by the function allocate_trace_buffer in the file kernel/trace/trace.c
1786164 - CVE-2019-19768 kernel: use-after-free in __blk_add_trace in kernel/trace/blktrace.c
1825116 - CVE-2020-10711 Kernel: NetLabel: null pointer dereference while receiving CIPSO packet with null category may cause kernel panic
6. Package List:
Red Hat Enterprise Linux Client (v. 7):
Source:
kernel-3.10.0-1127.8.2.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-1127.8.2.el7.noarch.rpm
kernel-doc-3.10.0-1127.8.2.el7.noarch.rpm
x86_64:
bpftool-3.10.0-1127.8.2.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-devel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-headers-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1127.8.2.el7.x86_64.rpm
perf-3.10.0-1127.8.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64:
bpftool-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1127.8.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
kernel-3.10.0-1127.8.2.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-1127.8.2.el7.noarch.rpm
kernel-doc-3.10.0-1127.8.2.el7.noarch.rpm
x86_64:
bpftool-3.10.0-1127.8.2.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-devel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-headers-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1127.8.2.el7.x86_64.rpm
perf-3.10.0-1127.8.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64:
bpftool-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1127.8.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
kernel-3.10.0-1127.8.2.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-1127.8.2.el7.noarch.rpm
kernel-doc-3.10.0-1127.8.2.el7.noarch.rpm
ppc64:
bpftool-3.10.0-1127.8.2.el7.ppc64.rpm
bpftool-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-debug-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-debug-devel-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-devel-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-headers-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-tools-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-tools-libs-3.10.0-1127.8.2.el7.ppc64.rpm
perf-3.10.0-1127.8.2.el7.ppc64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
python-perf-3.10.0-1127.8.2.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
ppc64le:
bpftool-3.10.0-1127.8.2.el7.ppc64le.rpm
bpftool-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-debug-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-devel-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-headers-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-tools-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-1127.8.2.el7.ppc64le.rpm
perf-3.10.0-1127.8.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
python-perf-3.10.0-1127.8.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
s390x:
bpftool-3.10.0-1127.8.2.el7.s390x.rpm
bpftool-debuginfo-3.10.0-1127.8.2.el7.s390x.rpm
kernel-3.10.0-1127.8.2.el7.s390x.rpm
kernel-debug-3.10.0-1127.8.2.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.s390x.rpm
kernel-debug-devel-3.10.0-1127.8.2.el7.s390x.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-1127.8.2.el7.s390x.rpm
kernel-devel-3.10.0-1127.8.2.el7.s390x.rpm
kernel-headers-3.10.0-1127.8.2.el7.s390x.rpm
kernel-kdump-3.10.0-1127.8.2.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-1127.8.2.el7.s390x.rpm
kernel-kdump-devel-3.10.0-1127.8.2.el7.s390x.rpm
perf-3.10.0-1127.8.2.el7.s390x.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.s390x.rpm
python-perf-3.10.0-1127.8.2.el7.s390x.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.s390x.rpm
x86_64:
bpftool-3.10.0-1127.8.2.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-devel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-headers-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1127.8.2.el7.x86_64.rpm
perf-3.10.0-1127.8.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
ppc64:
bpftool-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-1127.8.2.el7.ppc64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.ppc64.rpm
ppc64le:
bpftool-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-1127.8.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.ppc64le.rpm
x86_64:
bpftool-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1127.8.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
kernel-3.10.0-1127.8.2.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-1127.8.2.el7.noarch.rpm
kernel-doc-3.10.0-1127.8.2.el7.noarch.rpm
x86_64:
bpftool-3.10.0-1127.8.2.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-devel-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-headers-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1127.8.2.el7.x86_64.rpm
perf-3.10.0-1127.8.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
x86_64:
bpftool-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1127.8.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1127.8.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1127.8.2.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-2017-18595
https://access.redhat.com/security/cve/CVE-2019-19768
https://access.redhat.com/security/cve/CVE-2020-10711
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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AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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