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Red Hat OpenStack 13.0 RHSA-2021-3503-01 Critical dnsmasq Config Problem

red hat
Calendar Grey September 13, 2021
Dist Redhat Esm H88
Patch release for openstack-neutron in Red Hat OpenStack Platform 13 resolves critical vulnerabilities affecting networking functionalities.
An update for openstack-neutron is now available for Red Hat OpenStack Platform 13 (Queens)

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

Summary

Neutron is a virtual network service for OpenStack. Just like OpenStack Nova provides an API to dynamically request and configure virtual servers, Neutron provides an API to dynamically request and configure virtual networks. These networks connect "interfaces" from other OpenStack services (e.g., virtual NICs from Nova VMs). The Neutron API supports extensions to provide advanced network capabilities (e.g., QoS, ACLs, network, monitoring, etc.).
Security Fix(es):
* arbitrary dnsmasq reconfiguration via extra_dhcp_opts (CVE-2021-40085)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in the References section.

Topics%20covered

Topics Covered

security advisory security impact network service important update dnsmasq Red Hat OpenStack arbitrary configuration

References

https://access.redhat.com/security/cve/CVE-2021-40085 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat OpenStack Platform 13.0 for RHEL 7.6 EUS Server:
Source: openstack-neutron-12.1.1-42.1.el7ost.src.rpm
noarch: openstack-neutron-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-common-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-linuxbridge-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-macvtap-agent-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-metering-agent-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-ml2-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-openvswitch-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-rpc-server-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-sriov-nic-agent-12.1.1-42.1.el7ost.noarch.rpm python-neutron-12.1.1-42.1.el7ost.noarch.rpm
Red Hat OpenStack Platform 13.0 - ELS:
Source: openstack-neutron-12.1.1-42.1.el7ost.src.rpm
noarch: openstack-neutron-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-common-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-linuxbridge-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-macvtap-agent-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-metering-agent-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-ml2-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-openvswitch-12.1.1-42.1.el7ost.noarch.rpm openstack-neutron-rpc-server-12.1.1-42.1.el7ost.noarch.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3503-01
Product: Red Hat OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3503
Issue date: 2021-09-13

Topic

An update for openstack-neutron is now available for Red Hat OpenStackPlatform 13 (Queens).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 security impact network service important update dnsmasq Red Hat OpenStack arbitrary configuration

Relevant Releases Architectures

Red Hat OpenStack Platform 13.0 - ELS - noarch

Red Hat OpenStack Platform 13.0 for RHEL 7.6 EUS Server - noarch

Bugs Fixed

1998052 - CVE-2021-40085 openstack-neutron: arbitrary dnsmasq reconfiguration via extra_dhcp_opts

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