Red Hat Security Advisory 2019-2869-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a buffer overflow vulnerability.
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Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2019:2869-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2869
Issue date: 2019-09-23
CVE Names: CVE-2019-14835
====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 6.6
Advanced 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 Server AUS (v. 6.6) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.6) - 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)
Bug Fix(es):
* fragmented packets timing out (BZ#1741131)
* Backport TCP follow-up for small buffers (BZ#1741143)
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. 6.6):
Source:
kernel-2.6.32-504.81.2.el6.src.rpm
noarch:
kernel-abi-whitelists-2.6.32-504.81.2.el6.noarch.rpm
kernel-doc-2.6.32-504.81.2.el6.noarch.rpm
kernel-firmware-2.6.32-504.81.2.el6.noarch.rpm
x86_64:
kernel-2.6.32-504.81.2.el6.x86_64.rpm
kernel-debug-2.6.32-504.81.2.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
kernel-debug-devel-2.6.32-504.81.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.81.2.el6.x86_64.rpm
kernel-devel-2.6.32-504.81.2.el6.x86_64.rpm
kernel-headers-2.6.32-504.81.2.el6.x86_64.rpm
perf-2.6.32-504.81.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 6.6):
x86_64:
kernel-debug-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.81.2.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.81.2.el6.x86_64.rpm
python-perf-2.6.32-504.81.2.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.81.2.el6.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 <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2019 Red Hat, Inc.
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