FKIE_CVE-2011-4528

Vulnerability from fkie_nvd - Published: 2011-12-20 11:55 - Updated: 2026-04-29 01:13
Severity
Summary
Unbound before 1.4.13p2 attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone, which allows remote DNS servers to cause a denial of service (daemon crash) via a crafted response.
References
cret@cert.orghttp://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html
cret@cert.orghttp://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html
cret@cert.orghttp://osvdb.org/77909
cret@cert.orghttp://secunia.com/advisories/47326
cret@cert.orghttp://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txtPatch, Vendor Advisory
cret@cert.orghttp://www.debian.org/security/2011/dsa-2370
cret@cert.orghttp://www.kb.cert.org/vuls/id/209659Patch, Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html
af854a3a-2127-422b-91ae-364da2661108http://osvdb.org/77909
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/47326
af854a3a-2127-422b-91ae-364da2661108http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txtPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2011/dsa-2370
af854a3a-2127-422b-91ae-364da2661108http://www.kb.cert.org/vuls/id/209659Patch, Third Party Advisory, US Government Resource
Impacted products
Vendor Product Version
unbound unbound *
unbound unbound 0.0
unbound unbound 0.1
unbound unbound 0.2
unbound unbound 0.3
unbound unbound 0.4
unbound unbound 0.5
unbound unbound 0.6
unbound unbound 0.7
unbound unbound 0.7.1
unbound unbound 0.7.2
unbound unbound 0.8
unbound unbound 0.09
unbound unbound 0.10
unbound unbound 0.11
unbound unbound 1.0.0
unbound unbound 1.0.1
unbound unbound 1.0.2
unbound unbound 1.1.0
unbound unbound 1.1.1
unbound unbound 1.2.0
unbound unbound 1.2.1
unbound unbound 1.3.0
unbound unbound 1.3.1
unbound unbound 1.3.2
unbound unbound 1.3.3
unbound unbound 1.3.4
unbound unbound 1.4.0
unbound unbound 1.4.1
unbound unbound 1.4.2
unbound unbound 1.4.3
unbound unbound 1.4.4
unbound unbound 1.4.5
unbound unbound 1.4.6
unbound unbound 1.4.7
unbound unbound 1.4.8
unbound unbound 1.4.9
unbound unbound 1.4.10
unbound unbound 1.4.11
unbound unbound 1.4.12
unbound unbound 1.4.14
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Unbound before 1.4.13p2 attempts to free unallocated memory during processing of duplicate CNAME records in a signed zone, which allows remote DNS servers to cause a denial of service (daemon crash) via a crafted response."
    },
    {
      "lang": "es",
      "value": "Unbound antes de v1.4.13p2 intenta liberar memoria sin asignar durante el procesado de registros CNAME duplicados, lo que permite a servidores DNS remotos provocar una denegaci\u00f3n de servicio (ca\u00edda del demonio) a trav\u00e9s de una respuesta modificada."
    }
  ],
  "evaluatorComment": "Per: http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt\r\n\r\n\"1.4.14 is released with the patch, but 1.4.14rc1 is vulnerable.\r\nhttp://www.unbound.net/downloads/unbound-1.4.14.tar.gz\"",
  "id": "CVE-2011-4528",
  "lastModified": "2026-04-29T01:13:23.040",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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  },
  "published": "2011-12-20T11:55:05.757",
  "references": [
    {
      "source": "cret@cert.org",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html"
    },
    {
      "source": "cret@cert.org",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html"
    },
    {
      "source": "cret@cert.org",
      "url": "http://osvdb.org/77909"
    },
    {
      "source": "cret@cert.org",
      "url": "http://secunia.com/advisories/47326"
    },
    {
      "source": "cret@cert.org",
      "tags": [
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        "Vendor Advisory"
      ],
      "url": "http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt"
    },
    {
      "source": "cret@cert.org",
      "url": "http://www.debian.org/security/2011/dsa-2370"
    },
    {
      "source": "cret@cert.org",
      "tags": [
        "Patch",
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "http://www.kb.cert.org/vuls/id/209659"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://osvdb.org/77909"
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      "url": "http://www.debian.org/security/2011/dsa-2370"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "http://www.kb.cert.org/vuls/id/209659"
    }
  ],
  "sourceIdentifier": "cret@cert.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.