Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 510
Alerts This Week
Warning Icon 1 510

RedHat: RHSA-2019-2924-01 Important: Buffer Overflow in Virtualization Host

red hat
Calendar Grey September 27, 2019
Dist Redhat Esm H88
A crucial notice for Red Hat Virtualization pertaining to a critical buffer overflow security patch that carries far-reaching implications.
An update for redhat-release-virtualization-host and redhat-virtualization-host is now available for Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUS

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

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.
The following packages have been upgraded to a later upstream version: redhat-release-virtualization-host (4.2), redhat-virtualization-host (4.2). (BZ#1751435)
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)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Topics%20covered

Topics Covered

security advisory update buffer overflow important security impact redhat virtualization host

References

https://access.redhat.com/security/cve/CVE-2019-14835 https://access.redhat.com/security/vulnerabilities/kernel-vhost 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-4.2-14.1.el7.src.rpm redhat-virtualization-host-4.2-20190919.0.el7_6.src.rpm
noarch: redhat-virtualization-host-image-update-4.2-20190919.0.el7_6.noarch.rpm redhat-virtualization-host-image-update-placeholder-4.2-14.1.el7.noarch.rpm
x86_64: redhat-release-virtualization-host-4.2-14.1.el7.x86_64.rpm redhat-release-virtualization-host-content-4.2-14.1.el7.x86_64.rpm
RHEL 7-based RHEV-H for RHEV 4.2 (build requirements):
Source: redhat-release-virtualization-host-4.2-14.1.el7.src.rpm
noarch: redhat-virtualization-host-image-update-placeholder-4.2-14.1.el7.noarch.rpm
x86_64: redhat-release-virtualization-host-4.2-14.1.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/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:2924-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2924
Issue date: 2019-09-27

Topic

An update for redhat-release-virtualization-host andredhat-virtualization-host is now available for Red Hat Virtualization 4.2for Red Hat Enterprise Linux 7.6 EUS.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 update buffer overflow important security impact redhat virtualization host

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

1750351 - Rebase RHV-H 4.2 EUS on RHEL-7.6.EUS #7

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

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.