RedHat: RHSA-2019-1594:01 Important: redhat-virtualization-host security
Summary
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.
Summary
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
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
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/
Topic
An update for redhat-virtualization-host is now available for Red HatVirtualization 4 for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this updated 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.
Topic
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
Bugs Fixed
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
