{
  "modified": "2025-04-09T00:30:58Z",
  "published": "2009-01-07T17:30:00Z",
  "id": "CVE-2009-0021",
  "details": "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.",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://secunia.com/advisories/33406"
    },
    {
      "type": "ADVISORY",
      "url": "http://secunia.com/advisories/33558"
    },
    {
      "type": "ADVISORY",
      "url": "http://secunia.com/advisories/33648"
    },
    {
      "type": "ADVISORY",
      "url": "http://secunia.com/advisories/34642"
    },
    {
      "type": "ADVISORY",
      "url": "http://secunia.com/advisories/35074"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.ocert.org/advisories/ocert-2008-016.html"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.vupen.com/english/advisories/2009/0042"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.vupen.com/english/advisories/2009/1297"
    },
    {
      "type": "WEB",
      "url": "http://lists.apple.com/archives/security-announce/2009/May/msg00002.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html"
    },
    {
      "type": "WEB",
      "url": "http://slackware.com/security/viewer.php?l=slackware-security\u0026y=2009\u0026m=slackware-security.531177"
    },
    {
      "type": "WEB",
      "url": "http://support.apple.com/kb/HT3549"
    },
    {
      "type": "WEB",
      "url": "http://www.redhat.com/support/errata/RHSA-2009-0046.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/archive/1/499827/100/0/threaded"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id?1021533"
    },
    {
      "type": "WEB",
      "url": "http://www.us-cert.gov/cas/techalerts/TA09-133A.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.ntp.org/pipermail/announce/2009-January/000055.html"
    },
    {
      "type": "WEB",
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10035"
    }
  ]
}