{
  "id": "CVE-2009-0021",
  "sourceIdentifier": "secalert@redhat.com",
  "published": "2009-01-07T17:30:00.360",
  "lastModified": "2018-10-11T20:58:43.337",
  "vulnStatus": "Modified",
  "evaluatorComment": "Note that versions 4.2.5 before 4.2.5p150 are development versions and not production versions.  Development versions are not included in the CPE configuration for CVEs.",
  "descriptions": [
    {
      "lang": "en",
      "value": "NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077."
    },
    {
      "lang": "es",
      "value": "NTP versiones 4.2.4 anteriores a 4.2.4p5 y versiones 4.2.5 anteriores a 4.2.5p150, no comprueba apropiadamente el valor devuelto de la funci\u00f3n EVP_VerifyFinal de OpenSSL, que permite a los atacantes remotos omitir la comprobaci\u00f3n de la cadena de certificados por medio de una firma de SSL/TLS malformada para las claves DSA y ECDSA, una vulnerabilidad similar a CVE-2008-5077."
    }
  ],
  "metrics": {
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "criteria": "cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*",
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              "matchCriteriaId": "94D9BEE4-25C2-4147-B075-50F46113F59E"
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  ],
  "references": [
    {
      "url": "http://lists.apple.com/archives/security-announce/2009/May/msg00002.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.531177",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://support.apple.com/kb/HT3549",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.ocert.org/advisories/ocert-2008-016.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2009-0046.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/499827/100/0/threaded",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.securitytracker.com/id?1021533",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.us-cert.gov/cas/techalerts/TA09-133A.html",
      "source": "secalert@redhat.com",
      "tags": [
        "US Government Resource"
      ]
    },
    {
      "url": "http://www.vupen.com/english/advisories/2009/0042",
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://www.vupen.com/english/advisories/2009/1297",
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://lists.ntp.org/pipermail/announce/2009-January/000055.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035",
      "source": "secalert@redhat.com"
    }
  ]
}