RHSA-2018:2715
Vulnerability from csaf_redhat - Published: 2018-09-17 16:52 - Updated: 2025-11-21 18:06Summary
Red Hat Security Advisory: openstack-neutron security and bug fix update
Severity
Moderate
Notes
Topic: An update for openstack-neutron is now available for Red Hat OpenStack Platform 10.0 (Newton).
Red Hat Product Security has rated this update as having a security impact of Moderate. 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.
Details: OpenStack Networking (neutron) is a pluggable, scalable, and API-driven system that provisions networking services to virtual machines. Its main function is to manage connectivity to and from virtual machines.
Security Fix(es):
* openstack-neutron: A router interface out of subnet IP range results in a denial of service (CVE-2018-14635)
For more details about the security issue, including the impact, a CVSS score, and other related information, refer to the CVE page listed in the References section.
Bug Fix(es):
* A new configuration option bridge_mac_table_size has been added for the neutron OVS agent. This value is set on every Open vSwitch bridge managed by the openvswitch-neutron-agent. The value controls the maximum number of MAC addresses that can be learned on a bridge. The default value for this new option is 50,000, which should be enough for most systems. Values outside a reasonable range (10 to 1,000,000) might be overridden by Open vSwitch. (BZ#1589031)
* Previously, when a VM was destroyed, the IPv6 lease was not removed from dnsmasq lease files due to a missing dhcp_release6 binary.
With this update, the dhcp_release6 binary is now provided in an updated dnsmasq-utils package version. (BZ#1545006)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
When using the Linux bridge ml2 driver, non-privileged tenants are able to create and attach ports without specifying an IP address, bypassing IP address validation. A potential denial of service could occur if an IP address, conflicting with existing guests or routers, is then assigned from outside of the allowed allocation pool.
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2018:2715
References
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"7Server-RH7-RHOS-10.0:python-neutron-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:python-neutron-tests-1:9.4.1-28.el7ost.noarch"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2018-14635"
},
{
"category": "external",
"summary": "RHBZ#1607822",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1607822"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2018-14635",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-14635"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-14635",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-14635"
}
],
"release_date": "2018-03-21T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2018-09-17T16:52:42+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-28.el7ost.src",
"7Server-RH7-RHOS-10.0:openstack-neutron-common-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-linuxbridge-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-macvtap-agent-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-metering-agent-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-ml2-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-openvswitch-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-rpc-server-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-sriov-nic-agent-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:python-neutron-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:python-neutron-tests-1:9.4.1-28.el7ost.noarch"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2018:2715"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
},
"products": [
"7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-28.el7ost.src",
"7Server-RH7-RHOS-10.0:openstack-neutron-common-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-linuxbridge-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-macvtap-agent-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-metering-agent-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-ml2-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-openvswitch-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-rpc-server-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:openstack-neutron-sriov-nic-agent-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:python-neutron-1:9.4.1-28.el7ost.noarch",
"7Server-RH7-RHOS-10.0:python-neutron-tests-1:9.4.1-28.el7ost.noarch"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "openstack-neutron: A router interface out of subnet IP range results in a denial of service"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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