Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2021.3386
kpatch-patch security update
13 October 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kpatch-patch
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Increased Privileges -- Existing Account
Reduced Security -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-37576 CVE-2021-22555 CVE-2021-22543
Reference: ESB-2021.3372
ESB-2021.3324
ESB-2021.3304
ESB-2021.3249
ESB-2021.3247
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:3814
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Red Hat Security Advisory
Synopsis: Important: kpatch-patch security update
Advisory ID: RHSA-2021:3814-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3814
Issue date: 2021-10-12
CVE Names: CVE-2021-22543 CVE-2021-22555 CVE-2021-37576
=====================================================================
1. Summary:
An update is now available for Red Hat Enterprise Linux 7.6 Update Services
for SAP Solutions.
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 Server E4S (v. 7.6) - ppc64le, x86_64
3. Description:
This is a kernel live patch module which is automatically loaded by the RPM
post-install script to modify the code of a running kernel.
Security Fix(es):
* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO
checks (CVE-2021-22543)
* kernel: out-of-bounds write in xt_compat_target_from_user() in
net/netfilter/x_tables.c (CVE-2021-22555)
* kernel: powerpc: KVM guest OS users can cause host OS memory corruption
(CVE-2021-37576)
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.
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
5. Bugs fixed (https://bugzilla.redhat.com/):
1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks
1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c
1986506 - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption
6. Package List:
Red Hat Enterprise Linux Server E4S (v. 7.6):
Source:
kpatch-patch-3_10_0-957_61_1-1-6.el7.src.rpm
kpatch-patch-3_10_0-957_61_2-1-6.el7.src.rpm
kpatch-patch-3_10_0-957_62_1-1-6.el7.src.rpm
kpatch-patch-3_10_0-957_65_1-1-6.el7.src.rpm
kpatch-patch-3_10_0-957_66_1-1-6.el7.src.rpm
kpatch-patch-3_10_0-957_70_1-1-5.el7.src.rpm
kpatch-patch-3_10_0-957_72_1-1-3.el7.src.rpm
kpatch-patch-3_10_0-957_76_1-1-3.el7.src.rpm
kpatch-patch-3_10_0-957_78_2-1-2.el7.src.rpm
kpatch-patch-3_10_0-957_80_1-1-1.el7.src.rpm
ppc64le:
kpatch-patch-3_10_0-957_61_1-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_61_1-debuginfo-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_61_2-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_61_2-debuginfo-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_62_1-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_62_1-debuginfo-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_65_1-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_65_1-debuginfo-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_66_1-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_66_1-debuginfo-1-6.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_70_1-1-5.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_70_1-debuginfo-1-5.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_72_1-1-3.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_72_1-debuginfo-1-3.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_76_1-1-3.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_76_1-debuginfo-1-3.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_78_2-1-2.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_78_2-debuginfo-1-2.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_80_1-1-1.el7.ppc64le.rpm
kpatch-patch-3_10_0-957_80_1-debuginfo-1-1.el7.ppc64le.rpm
x86_64:
kpatch-patch-3_10_0-957_61_1-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_61_1-debuginfo-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_61_2-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_61_2-debuginfo-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_62_1-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_62_1-debuginfo-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_65_1-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_65_1-debuginfo-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_66_1-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_66_1-debuginfo-1-6.el7.x86_64.rpm
kpatch-patch-3_10_0-957_70_1-1-5.el7.x86_64.rpm
kpatch-patch-3_10_0-957_70_1-debuginfo-1-5.el7.x86_64.rpm
kpatch-patch-3_10_0-957_72_1-1-3.el7.x86_64.rpm
kpatch-patch-3_10_0-957_72_1-debuginfo-1-3.el7.x86_64.rpm
kpatch-patch-3_10_0-957_76_1-1-3.el7.x86_64.rpm
kpatch-patch-3_10_0-957_76_1-debuginfo-1-3.el7.x86_64.rpm
kpatch-patch-3_10_0-957_78_2-1-2.el7.x86_64.rpm
kpatch-patch-3_10_0-957_78_2-debuginfo-1-2.el7.x86_64.rpm
kpatch-patch-3_10_0-957_80_1-1-1.el7.x86_64.rpm
kpatch-patch-3_10_0-957_80_1-debuginfo-1-1.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-2021-22543
https://access.redhat.com/security/cve/CVE-2021-22555
https://access.redhat.com/security/cve/CVE-2021-37576
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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