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RedHat RHSA-2019-2864-01 Important Security Update for Kernel

Calendar Sep 23, 2019 • User Avatar LinuxSecurity Advisories
5 - 10 min read
Redhat Large Esm H500
Topics%20covered

Topics Covered

security advisory buffer overflow red hat software update important kernel security impact
An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, 
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Hash: SHA256

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

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2019:2864-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:2864
Issue date:        2019-09-23
CVE Names:         CVE-2019-14835 
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.6
Extended Update Support.

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 ComputeNode EUS (v. 7.6) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.6) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es):

* A buffer overflow flaw was found in the way Linux kernel's vhost
functionality that translates virtqueue buffers to IOVs, logged the buffer
descriptors during migration. A privileged guest user able to pass
descriptors with invalid length to the host when migration is underway,
could use this flaw to increase their privileges on the host.
(CVE-2019-14835)

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/):

1750727 - CVE-2019-14835 kernel: vhost-net: guest to host kernel escape during migration

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):

Source:
kernel-3.10.0-957.35.2.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.35.2.el7.noarch.rpm
kernel-doc-3.10.0-957.35.2.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.35.2.el7.x86_64.rpm
kernel-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debug-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.35.2.el7.x86_64.rpm
kernel-devel-3.10.0-957.35.2.el7.x86_64.rpm
kernel-headers-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.35.2.el7.x86_64.rpm
perf-3.10.0-957.35.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
python-perf-3.10.0-957.35.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):

x86_64:
kernel-debug-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.35.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.6):

Source:
kernel-3.10.0-957.35.2.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.35.2.el7.noarch.rpm
kernel-doc-3.10.0-957.35.2.el7.noarch.rpm

ppc64:
kernel-3.10.0-957.35.2.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-957.35.2.el7.ppc64.rpm
kernel-debug-3.10.0-957.35.2.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm
kernel-debug-devel-3.10.0-957.35.2.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.35.2.el7.ppc64.rpm
kernel-devel-3.10.0-957.35.2.el7.ppc64.rpm
kernel-headers-3.10.0-957.35.2.el7.ppc64.rpm
kernel-tools-3.10.0-957.35.2.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm
kernel-tools-libs-3.10.0-957.35.2.el7.ppc64.rpm
perf-3.10.0-957.35.2.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm
python-perf-3.10.0-957.35.2.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm

ppc64le:
kernel-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-debug-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-devel-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-headers-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-tools-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-957.35.2.el7.ppc64le.rpm
perf-3.10.0-957.35.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm
python-perf-3.10.0-957.35.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm

s390x:
kernel-3.10.0-957.35.2.el7.s390x.rpm
kernel-debug-3.10.0-957.35.2.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-957.35.2.el7.s390x.rpm
kernel-debug-devel-3.10.0-957.35.2.el7.s390x.rpm
kernel-debuginfo-3.10.0-957.35.2.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-957.35.2.el7.s390x.rpm
kernel-devel-3.10.0-957.35.2.el7.s390x.rpm
kernel-headers-3.10.0-957.35.2.el7.s390x.rpm
kernel-kdump-3.10.0-957.35.2.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-957.35.2.el7.s390x.rpm
kernel-kdump-devel-3.10.0-957.35.2.el7.s390x.rpm
perf-3.10.0-957.35.2.el7.s390x.rpm
perf-debuginfo-3.10.0-957.35.2.el7.s390x.rpm
python-perf-3.10.0-957.35.2.el7.s390x.rpm
python-perf-debuginfo-3.10.0-957.35.2.el7.s390x.rpm

x86_64:
bpftool-3.10.0-957.35.2.el7.x86_64.rpm
kernel-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debug-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.35.2.el7.x86_64.rpm
kernel-devel-3.10.0-957.35.2.el7.x86_64.rpm
kernel-headers-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.35.2.el7.x86_64.rpm
perf-3.10.0-957.35.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
python-perf-3.10.0-957.35.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.6):

ppc64:
kernel-debug-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm
kernel-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-957.35.2.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-957.35.2.el7.ppc64.rpm
perf-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-957.35.2.el7.ppc64.rpm

ppc64le:
kernel-debug-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-957.35.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.35.2.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.35.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.35.2.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-2019-14835
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/kernel-vhost

8. Contact:

The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2019 Red Hat, Inc.
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RedHat RHSA-2019-2864-01 Important Security Update for Kernel

red hat
Calendar Grey September 23, 2019
Dist Redhat Esm H88
Red Hat announces a significant security patch for the kernel, targeting a severe buffer overflow vulnerability present in RHEL 7.6.
An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support

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.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* A buffer overflow flaw was found in the way Linux kernel's vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host. (CVE-2019-14835)

Topics%20covered

Topics Covered

security advisory buffer overflow red hat software update important kernel security impact

References

https://access.redhat.com/security/cve/CVE-2019-14835 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/kernel-vhost

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
Source: kernel-3.10.0-957.35.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.35.2.el7.noarch.rpm kernel-doc-3.10.0-957.35.2.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.35.2.el7.x86_64.rpm kernel-3.10.0-957.35.2.el7.x86_64.rpm kernel-debug-3.10.0-957.35.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.35.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.35.2.el7.x86_64.rpm kernel-devel-3.10.0-957.35.2.el7.x86_64.rpm kernel-headers-3.10.0-957.35.2.el7.x86_64.rpm kernel-tools-3.10.0-957.35.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.35.2.el7.x86_64.rpm perf-3.10.0-957.35.2.el7.x86_64.rpm perf-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm python-perf-3.10.0-957.35.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.35.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.35.2.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2864-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2864
Issue date: 2019-09-23

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory buffer overflow red hat software update important kernel security impact

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.6) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, x86_64

Bugs Fixed

1750727 - CVE-2019-14835 kernel: vhost-net: guest to host kernel escape during migration

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