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AUSCERT External Security Bulletin Redistribution
ESB-2019.3464
Important: kernel-rt security and bug fix update
12 September 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: kernel-rt
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 6
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Access Privileged Data -- Existing Account
Denial of Service -- Remote/Unauthenticated
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1125 CVE-2018-16884 CVE-2018-16871
CVE-2018-13405 CVE-2018-9568
Reference: ASB-2019.0229
ASB-2019.0002
ESB-2019.3433
ESB-2019.3430
ASB-2018.0295
Original Bulletin:
https://access.redhat.com/errata/RHSA-2019:2730
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Red Hat Security Advisory
Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2019:2730-01
Product: Red Hat Enterprise MRG for RHEL-6
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2730
Issue date: 2019-09-11
CVE Names: CVE-2018-9568 CVE-2018-13405 CVE-2018-16871
CVE-2018-16884 CVE-2019-1125
=====================================================================
1. Summary:
An update for kernel-rt is now available for Red Hat Enterprise MRG 2.
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 MRG Realtime for RHEL 6 Server v.2 - 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: Memory corruption due to incorrect socket cloning (CVE-2018-9568)
* kernel: Missing check in fs/inode.c:inode_init_owner() does not clear
SGID bit on non-directories for non-members (CVE-2018-13405)
* kernel: nfs: use-after-free in svc_process_common() (CVE-2018-16884)
* kernel: nfs: NULL pointer dereference due to an anomalized NFS message
sequence (CVE-2018-16871)
* kernel: hw: Spectre SWAPGS gadget vulnerability (CVE-2019-1125)
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):
* Backport TCP follow-up for small buffers [mrg-r] (BZ#1732110)
* update the MRG 2.5.z 3.10 realtime-kernel sources (BZ#1734469)
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/):
1599161 - CVE-2018-13405 kernel: Missing check in fs/inode.c:inode_init_owner() does not clear SGID bit on non-directories for non-members
1655162 - CVE-2018-16871 kernel: nfs: NULL pointer dereference due to an anomalized NFS message sequence
1655904 - CVE-2018-9568 kernel: Memory corruption due to incorrect socket cloning
1660375 - CVE-2018-16884 kernel: nfs: use-after-free in svc_process_common()
1724389 - CVE-2019-1125 kernel: hw: Spectre SWAPGS gadget vulnerability
1734469 - update the MRG 2.5.z 3.10 realtime-kernel sources
6. Package List:
Red Hat MRG Realtime for RHEL 6 Server v.2:
Source:
kernel-rt-3.10.0-693.58.1.rt56.652.el6rt.src.rpm
noarch:
kernel-rt-doc-3.10.0-693.58.1.rt56.652.el6rt.noarch.rpm
kernel-rt-firmware-3.10.0-693.58.1.rt56.652.el6rt.noarch.rpm
x86_64:
kernel-rt-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-debug-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-debug-devel-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-debuginfo-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-devel-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-trace-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-trace-devel-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-vanilla-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-vanilla-debuginfo-3.10.0-693.58.1.rt56.652.el6rt.x86_64.rpm
kernel-rt-vanilla-devel-3.10.0-693.58.1.rt56.652.el6rt.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-2018-9568
https://access.redhat.com/security/cve/CVE-2018-13405
https://access.redhat.com/security/cve/CVE-2018-16871
https://access.redhat.com/security/cve/CVE-2018-16884
https://access.redhat.com/security/cve/CVE-2019-1125
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/articles/4329821
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2019 Red Hat, Inc.
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