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Red Hat: RHSA-2019-2867-01 Important: Kernel Buffer Overflow Risk

Calendar Sep 23, 2019 • User Avatar LinuxSecurity Advisories
5 - 9 min read
Redhat Large Esm H500
Topics%20covered

Topics Covered

security advisory buffer overflow security fix important kernel red hat enterprise 2021
An update for kernel is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions. 
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Hash: SHA256

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

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2019:2867-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:2867
Issue date:        2019-09-23
CVE Names:         CVE-2019-14835 
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.4
Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.4 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 AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.4) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.4) - noarch, 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 Server AUS (v. 7.4):

Source:
kernel-3.10.0-693.59.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-693.59.1.el7.noarch.rpm
kernel-doc-3.10.0-693.59.1.el7.noarch.rpm

x86_64:
kernel-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.59.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.59.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.59.1.el7.x86_64.rpm
perf-3.10.0-693.59.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
python-perf-3.10.0-693.59.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.4):

Source:
kernel-3.10.0-693.59.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-693.59.1.el7.noarch.rpm
kernel-doc-3.10.0-693.59.1.el7.noarch.rpm

ppc64le:
kernel-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-debug-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-devel-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-headers-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-tools-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-693.59.1.el7.ppc64le.rpm
perf-3.10.0-693.59.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm
python-perf-3.10.0-693.59.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm

x86_64:
kernel-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.59.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.59.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.59.1.el7.x86_64.rpm
perf-3.10.0-693.59.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
python-perf-3.10.0-693.59.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.4):

Source:
kernel-3.10.0-693.59.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-693.59.1.el7.noarch.rpm
kernel-doc-3.10.0-693.59.1.el7.noarch.rpm

x86_64:
kernel-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.59.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.59.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.59.1.el7.x86_64.rpm
perf-3.10.0-693.59.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
python-perf-3.10.0-693.59.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.4):

x86_64:
kernel-debug-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.59.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.4):

ppc64le:
kernel-debug-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-693.59.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-693.59.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.59.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.4):

x86_64:
kernel-debug-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.59.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.59.1.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-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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Red Hat: RHSA-2019-2867-01 Important: Kernel Buffer Overflow Risk

red hat
Calendar Grey September 23, 2019
Dist Redhat Esm H88
System kernel patch for Red Hat Enterprise Linux resolves critical flaws while boosting overall performance and dependability.
An update for kernel is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise L...

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 security fix important kernel red hat enterprise 2021

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 Server AUS (v. 7.4):
Source: kernel-3.10.0-693.59.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-693.59.1.el7.noarch.rpm kernel-doc-3.10.0-693.59.1.el7.noarch.rpm
x86_64: kernel-3.10.0-693.59.1.el7.x86_64.rpm kernel-debug-3.10.0-693.59.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-693.59.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-693.59.1.el7.x86_64.rpm kernel-devel-3.10.0-693.59.1.el7.x86_64.rpm kernel-headers-3.10.0-693.59.1.el7.x86_64.rpm kernel-tools-3.10.0-693.59.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-693.59.1.el7.x86_64.rpm perf-3.10.0-693.59.1.el7.x86_64.rpm perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm python-perf-3.10.0-693.59.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-693.59.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.4):
Source: kernel-3.10.0-693.59.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-693.59.1.el7.noarch.rpm kernel-doc-3.10.0-693.59.1.el7.noarch.rpm
ppc64le: kernel-3.10.0-693.59.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-693.59.1.el7.ppc64le.rpm kernel-debug-3.10.0-693.59.1.el7.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2867-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2867
Issue date: 2019-09-23

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.4Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.4 Update Services for SAPSolutions.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 security fix important kernel red hat enterprise 2021

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.4) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.4) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.4) - noarch, x86_64

Bugs Fixed

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

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