RHSA-2018:1820 - Security Advisory

Topic

An update for imgbased, redhat-release-virtualization-host, and redhat-virtualization-host is now available for Red Hat Virtualization 4 for RHEL-7.

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.

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):

• procps-ng, procps: Integer overflows leading to heap overflow in file2strvec (CVE-2018-1124)
• procps-ng, procps: incorrect integer size in proc/alloc.* leading to truncation / integer overflow issues (CVE-2018-1126)

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.

Red Hat would like to thank Qualys Research Labs for reporting these issues.

Bug Fix(es):

• Previously some SELinux %post scripts were not re-executed because imgbased attempts to re-execute RPM %post scripts which involve SELinux commands inside a namespace, and some commands failed due to SELinux namespacing rules.

This update ensures that SELinux contexts inside imgbased update namespaces now update appropriately, and the scripts are re-executed by remounting /sys and /sys/fs/selinux inside the update namespace. (BZ#1571607)

• Previously, vmcore files that were created by kdump were not relabelled by kdumpctl after a reboot. As a result, Rsync returned an error when trying to remove the security.selinux attribute while syncing unlabelled files, as this is forbidden by selinux.

In this release, restorecon is run on the source directory before syncing it, which enables the files to be synchronized with the correct labels. (BZ#1579141)

Enhancement(s):

• Previously, imgbased filtered out stderr from LVM commands to improve parsing reliability. In this release, imgbased now logs stderr from LVM commands in order to provide this information in the imgbased logs, for example during an upgrade failure. (BZ#1574187)

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

Affected Products

• Red Hat Virtualization 4 for RHEL 7 x86_64
• Red Hat Virtualization Host 4 for RHEL 7 x86_64

Fixes

• BZ - 1571607 - Failed to open socket to sanlock daemon
• BZ - 1573334 - RHV-H update to latest version fails on RHV 4.1 due to yum transaction failure
• BZ - 1574187 - [RFE] provide LVM stderr in imgbased if an exception is caught
• BZ - 1575465 - CVE-2018-1124 procps-ng, procps: Integer overflows leading to heap overflow in file2strvec
• BZ - 1575853 - CVE-2018-1126 procps-ng, procps: incorrect integer size in proc/alloc.* leading to truncation / integer overflow issues
• BZ - 1575922 - RHVH 4.2 upgrade failed from 4.1 wrapper to wrapper
• BZ - 1579141 - [RHV4.2] unable to upgrade Host 4.1 (rhvh-4.1-0.20180126.0) to RHVH 4.2 (rhvh-4.2.3.0-0.20180508.0)
• BZ - 1582433 - Upgrade imgbased to 1.0.17

CVEs

• CVE-2018-1124
• CVE-2018-1126

References

• https://access.redhat.com/security/updates/classification/#important