Red Hat Security Advisory 2021-3328-01

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2021:3328-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:3328
Issue date:        2021-08-31
CVE Names:         CVE-2021-22555 CVE-2021-29154 CVE-2021-29650 
                   CVE-2021-32399 
=====================================================================

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: out-of-bounds write in xt_compat_target_from_user() in
net/netfilter/x_tables.c (CVE-2021-22555)

* kernel: race condition for removal of the HCI controller (CVE-2021-32399)

* kernel: Local privilege escalation due to incorrect BPF JIT branch
displacement computation (CVE-2021-29154)

* kernel: lack a full memory barrier upon the assignment of a new table
value in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h
may lead to DoS (CVE-2021-29650)

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.z8 source tree (BZ#1982927)

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/):

1945388 - CVE-2021-29650 kernel: lack a full memory barrier upon the assignment of a new table value in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h may lead to DoS
1946684 - CVE-2021-29154 kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation
1970807 - CVE-2021-32399 kernel: race condition for removal of the HCI controller
1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c

6. Package List:

Red Hat Enterprise Linux for Real Time for NFV (v. 7):

Source:
kernel-rt-3.10.0-1160.41.1.rt56.1181.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1160.41.1.rt56.1181.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm

Red Hat Enterprise Linux for Real Time (v. 7):

Source:
kernel-rt-3.10.0-1160.41.1.rt56.1181.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1160.41.1.rt56.1181.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1160.41.1.rt56.1181.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1160.41.1.rt56.1181.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-2021-22555
https://access.redhat.com/security/cve/CVE-2021-29154
https://access.redhat.com/security/cve/CVE-2021-29650
https://access.redhat.com/security/cve/CVE-2021-32399
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <[email protected]>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=WCEt
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
[email protected]
https://listman.redhat.com/mailman/listinfo/rhsa-announce