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Red Hat Security Advisory
Synopsis: Important: redhat-virtualization-host security update
Advisory ID: RHSA-2019:1594-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2019:1594
Issue date: 2019-06-25
CVE Names: CVE-2019-11477 CVE-2019-11478 CVE-2019-11479
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1. Summary:
An update for redhat-virtualization-host is now available for Red Hat
Virtualization 4 for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this updated 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:
RHEL 7-based RHEV-H for RHEV 4.2 (build requirements) – noarch, x86_64
Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS – noarch, x86_64
3. Description:
The redhat-virtualization-host packages provide the Red Hat Virtualization
Host. These packages include redhat-release-virtualization-host,
ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are
installed using a special build of Red Hat Enterprise Linux with only the
packages required to host virtual machines. RHVH features a Cockpit user
interface for monitoring the host’s resources and performing administrative
tasks.
Security Fix(es):
* Kernel: tcp: integer overflow while processing SACK blocks allows remote
denial of service (CVE-2019-11477)
* Kernel: tcp: excessive resource consumption while processing SACK blocks
allows remote denial of service (CVE-2019-11478)
* kernel: tcp: excessive resource consumption for TCP connections with low
MSS allows remote denial of service (CVE-2019-11479)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgements, and other related information, refer to the CVE
page(s) listed in the References section.
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/2974891
5. Bugs fixed (https://bugzilla.redhat.com/):
1719123 – CVE-2019-11477 Kernel: tcp: integer overflow while processing SACK blocks allows remote denial of service
1719128 – CVE-2019-11478 Kernel: tcp: excessive resource consumption while processing SACK blocks allows remote denial of service
1719129 – CVE-2019-11479 kernel: tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of service
1721369 – RHV-H 4.2 rebase on RHEL 7.6 async
6. Package List:
Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS:
Source:
redhat-release-virtualization-host-4.2-11.1.el7.src.rpm
redhat-virtualization-host-4.2-20190618.0.el7_6.src.rpm
noarch:
redhat-virtualization-host-image-update-4.2-20190618.0.el7_6.noarch.rpm
redhat-virtualization-host-image-update-placeholder-4.2-11.1.el7.noarch.rpm
x86_64:
redhat-release-virtualization-host-4.2-11.1.el7.x86_64.rpm
redhat-release-virtualization-host-content-4.2-11.1.el7.x86_64.rpm
RHEL 7-based RHEV-H for RHEV 4.2 (build requirements):
Source:
redhat-release-virtualization-host-4.2-11.1.el7.src.rpm
noarch:
redhat-virtualization-host-image-update-placeholder-4.2-11.1.el7.noarch.rpm
x86_64:
redhat-release-virtualization-host-4.2-11.1.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-2019-11477
https://access.redhat.com/security/cve/CVE-2019-11478
https://access.redhat.com/security/cve/CVE-2019-11479
https://access.redhat.com/security/updates/classification/#important
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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