Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2021.0934
kernel-rt security and bug fix update
17 March 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel-rt
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Increased Privileges -- Existing Account
Overwrite Arbitrary Files -- Remote/Unauthenticated
Denial of Service -- Existing Account
Access Confidential Data -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20265 CVE-2020-29661 CVE-2020-28374
CVE-2020-25705 CVE-2020-25656 CVE-2020-25645
CVE-2020-25211 CVE-2020-14351 CVE-2020-7053
CVE-2020-0427 CVE-2019-19532
Reference: ESB-2021.0842
ESB-2021.0837
ESB-2021.0717
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:0857
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Red Hat Security Advisory
Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2021:0857-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0857
Issue date: 2021-03-16
CVE Names: CVE-2019-19532 CVE-2020-0427 CVE-2020-7053
CVE-2020-14351 CVE-2020-25211 CVE-2020-25645
CVE-2020-25656 CVE-2020-25705 CVE-2020-28374
CVE-2020-29661 CVE-2021-20265
=====================================================================
1. Summary:
An update for kernel-rt 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 for Real Time (v. 7) - noarch, x86_64
Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, 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: Local buffer overflow in ctnetlink_parse_tuple_filter in
net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)
* kernel: SCSI target (LIO) write to any block on ILO backstore
(CVE-2020-28374)
* kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an
use-after-free (CVE-2020-29661)
* kernel: malicious USB devices can lead to multiple out-of-bounds write
(CVE-2019-19532)
* kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)
* kernel: use-after-free in i915_ppgtt_close in
drivers/gpu/drm/i915/i915_gem_gtt.c (CVE-2020-7053)
* kernel: performance counters race condition use-after-free
(CVE-2020-14351)
* kernel: Geneve/IPsec traffic may be unencrypted between two Geneve
endpoints (CVE-2020-25645)
* kernel: use-after-free in read in vt_do_kdgkb_ioctl (CVE-2020-25656)
* kernel: ICMP rate limiting can be used for DNS poisoning attack
(CVE-2020-25705)
* kernel: increase slab leak leads to DoS (CVE-2021-20265)
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 to the latest RHEL7.9.z4 source tree (BZ#1917909)
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/):
1781821 - CVE-2019-19532 kernel: malicious USB devices can lead to multiple out-of-bounds write
1795624 - CVE-2020-7053 kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c
1862849 - CVE-2020-14351 kernel: performance counters race condition use-after-free
1877571 - CVE-2020-25211 kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c
1883988 - CVE-2020-25645 kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints
1888726 - CVE-2020-25656 kernel: use-after-free in read in vt_do_kdgkb_ioctl
1894579 - CVE-2020-25705 kernel: ICMP rate limiting can be used for DNS poisoning attack
1899804 - CVE-2020-28374 kernel: SCSI target (LIO) write to any block on ILO backstore
1906525 - CVE-2020-29661 kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free
1908827 - CVE-2021-20265 kernel: increase slab leak leads to DoS
1919893 - CVE-2020-0427 kernel: out-of-bounds reads in pinctrl subsystem.
6. Package List:
Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source:
kernel-rt-3.10.0-1160.21.1.rt56.1158.el7.src.rpm
noarch:
kernel-rt-doc-3.10.0-1160.21.1.rt56.1158.el7.noarch.rpm
x86_64:
kernel-rt-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 7):
Source:
kernel-rt-3.10.0-1160.21.1.rt56.1158.el7.src.rpm
noarch:
kernel-rt-doc-3.10.0-1160.21.1.rt56.1158.el7.noarch.rpm
x86_64:
kernel-rt-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1160.21.1.rt56.1158.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1160.21.1.rt56.1158.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-2019-19532
https://access.redhat.com/security/cve/CVE-2020-0427
https://access.redhat.com/security/cve/CVE-2020-7053
https://access.redhat.com/security/cve/CVE-2020-14351
https://access.redhat.com/security/cve/CVE-2020-25211
https://access.redhat.com/security/cve/CVE-2020-25645
https://access.redhat.com/security/cve/CVE-2020-25656
https://access.redhat.com/security/cve/CVE-2020-25705
https://access.redhat.com/security/cve/CVE-2020-28374
https://access.redhat.com/security/cve/CVE-2020-29661
https://access.redhat.com/security/cve/CVE-2021-20265
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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