rhsa-2021_3502
Vulnerability from csaf_redhat
Published
2021-09-13 11:37
Modified
2024-11-05 23:55
Summary
Red Hat Security Advisory: Red Hat OpenStack Platform 10.0 (openstack-neutron) security update

Notes

Topic
An update for openstack-neutron is now available for Red Hat OpenStack Platform 10 (Newton). 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.
Details
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.
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.


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  "vulnerabilities": [
    {
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        {
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      "cve": "CVE-2021-40085",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
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      "discovery_date": "2021-08-26T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1998052"
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      "notes": [
        {
          "category": "description",
          "text": "An input-validation flaw was found in openstack-neutron, where an authenticated attacker could change the dnsmasq configuration. By crafting extra_dhcp_opts values, the attacker could crash the dnsmasq, change parameters for tenants sharing the same interface, or otherwise alter that daemon\u2019s behavior. This flaw might also be used to trigger a configuration parsing buffer overflow in versions of dnsmasq prior to 2.81. The highest threat from this vulnerability is to system availability, but also threatens data confidentiality and integrity.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "openstack-neutron: arbitrary dnsmasq reconfiguration via extra_dhcp_opts",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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          "category": "vendor_fix",
          "date": "2021-09-13T11:37:21+00:00",
          "details": "For details on how to apply this update, which includes the changes\ndescribed in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-56.el7ost.src",
            "7Server-RH7-RHOS-10.0:openstack-neutron-common-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-linuxbridge-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-macvtap-agent-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-metering-agent-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-ml2-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-openvswitch-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-rpc-server-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-sriov-nic-agent-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:python-neutron-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:python-neutron-tests-1:9.4.1-56.el7ost.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:3502"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
          "product_ids": [
            "7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-56.el7ost.src",
            "7Server-RH7-RHOS-10.0:openstack-neutron-common-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-linuxbridge-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-macvtap-agent-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-metering-agent-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-ml2-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-openvswitch-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-rpc-server-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-sriov-nic-agent-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:python-neutron-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:python-neutron-tests-1:9.4.1-56.el7ost.noarch"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-1:9.4.1-56.el7ost.src",
            "7Server-RH7-RHOS-10.0:openstack-neutron-common-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-linuxbridge-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-macvtap-agent-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-metering-agent-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-ml2-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-openvswitch-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-rpc-server-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:openstack-neutron-sriov-nic-agent-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:python-neutron-1:9.4.1-56.el7ost.noarch",
            "7Server-RH7-RHOS-10.0:python-neutron-tests-1:9.4.1-56.el7ost.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "openstack-neutron: arbitrary dnsmasq reconfiguration via extra_dhcp_opts"
    }
  ]
}


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