csaf_redhat - rhsa-2021

rhsa-2021_3503

Vulnerability from csaf_redhat

Published

2021-09-13 12:04

Modified

2024-11-15 10:37

Summary

Red Hat Security Advisory: Red Hat OpenStack Platform 13.0 (openstack-neutron) security update

Notes

Topic

An update for openstack-neutron is now available for Red Hat OpenStack Platform 13 (Queens). 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.

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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        "text": "An update for openstack-neutron is now available for Red Hat OpenStack\nPlatform 13 (Queens).\n\nRed Hat Product Security has rated this update as having a security impact\nof Important. A Common Vulnerability Scoring System (CVSS) base score,\nwhich gives a detailed severity rating, is available for each vulnerability\nfrom the CVE link(s) in the References section.",
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  "vulnerabilities": [
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      "acknowledgments": [
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          "names": [
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        }
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      "cve": "CVE-2021-40085",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "discovery_date": "2021-08-26T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1998052"
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        {
          "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"
        }
      ],
      "product_status": {
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-40085"
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          "summary": "RHBZ#1998052",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1998052"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-40085",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-40085"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-40085",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40085"
        },
        {
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          "url": "https://security.openstack.org/ossa/OSSA-2021-005.html"
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      ],
      "release_date": "2021-08-31T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-09-13T12:04:20+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",
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            "attackVector": "NETWORK",
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            "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"
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "openstack-neutron: arbitrary dnsmasq reconfiguration via extra_dhcp_opts"
    }
  ]
}

cve-2021-40085

Vulnerability from cvelistv5

Published

2021-08-31 17:32

Modified

2024-08-04 02:27

Severity ?

Summary

An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. Authenticated attackers can reconfigure dnsmasq via a crafted extra_dhcp_opts value.

References

▼	URL	Tags
	https://launchpad.net/bugs/1939733	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2021/08/31/2	mailing-list, x_refsource_MLIST
	https://security.openstack.org/ossa/OSSA-2021-005.html	x_refsource_MISC
	https://lists.debian.org/debian-lts-announce/2021/10/msg00005.html	mailing-list, x_refsource_MLIST
	https://www.debian.org/security/2021/dsa-4983	vendor-advisory, x_refsource_DEBIAN
	https://lists.debian.org/debian-lts-announce/2022/05/msg00038.html	mailing-list, x_refsource_MLIST

Impacted products

▼	Vendor	Product
	n/a	n/a

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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