{
  "threat_severity" : "Moderate",
  "public_date" : "2011-12-07T00:00:00Z",
  "bugzilla" : {
    "description" : "dhcp: DoS due to processing certain regular expressions",
    "id" : "761265",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=761265"
  },
  "cvss" : {
    "cvss_base_score" : "4.3",
    "cvss_scoring_vector" : "AV:N/AC:M/Au:N/C:N/I:N/A:P",
    "status" : "verified"
  },
  "details" : [ "dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet." ],
  "statement" : "This issue did not affect the versions of dhcp as shipped with Red Hat Enterprise Linux 4 and 5.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "release_date" : "2011-12-14T00:00:00Z",
    "advisory" : "RHSA-2011:1819",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6",
    "package" : "dhcp-12:4.1.1-25.P1.el6_2.1"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 4",
    "fix_state" : "Not affected",
    "package_name" : "dhcp",
    "cpe" : "cpe:/o:redhat:enterprise_linux:4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "dhcp",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2011-4539\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-4539" ],
  "name" : "CVE-2011-4539",
  "csaw" : false
}