rhsa-2023_2771
Vulnerability from csaf_redhat
Published
2023-05-16 08:37
Modified
2024-11-06 02:57
Summary
Red Hat Security Advisory: unbound security and bug fix update

Notes

Topic
An update for unbound is now available for Red Hat Enterprise Linux 8. 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
The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fix(es): * unbound: NRDelegation attack leads to uncontrolled resource consumption (Non-Responsive Delegation Attack) (CVE-2022-3204) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.8 Release Notes linked from 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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      "cve": "CVE-2022-3204",
      "discovery_date": "2022-09-22T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2128947"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability was found in unbound. The attack can cause a resolver to spend a lot of time and resources resolving records under a malicious delegation point where a considerable number of unresponsive NS records reside. This issue can trigger high CPU usage in some resolver implementations that continually look in the cache for resolved NS records in that delegation, leading to degraded performance and, eventually, a denial of service in orchestrated attacks.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "unbound: NRDelegation attack leads to uncontrolled resource consumption (Non-Responsive Delegation Attack)",
          "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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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2022-3204"
        },
        {
          "category": "external",
          "summary": "RHBZ#2128947",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2128947"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2022-3204",
          "url": "https://www.cve.org/CVERecord?id=CVE-2022-3204"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-3204",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-3204"
        },
        {
          "category": "external",
          "summary": "https://nlnetlabs.nl/downloads/unbound/CVE-2022-3204.txt",
          "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2022-3204.txt"
        }
      ],
      "release_date": "2022-09-21T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-05-16T08:37:44+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",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "unbound: NRDelegation attack leads to uncontrolled resource consumption (Non-Responsive Delegation Attack)"
    }
  ]
}


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  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
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