{
  "threat_severity" : "Low",
  "public_date" : "2017-04-07T00:00:00Z",
  "bugzilla" : {
    "description" : "glibc: Fragmentation attacks possible when EDNS0 is enabled",
    "id" : "1477529",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1477529"
  },
  "cvss3" : {
    "cvss3_base_score" : "3.0",
    "cvss3_scoring_vector" : "CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N",
    "status" : "verified"
  },
  "details" : [ "The DNS stub resolver in the GNU C Library (aka glibc or libc6) before version 2.26, when EDNS support is enabled, will solicit large UDP responses from name servers, potentially simplifying off-path DNS spoofing attacks due to IP fragmentation." ],
  "statement" : "This issue only affects systems which use a remote recursive resolver and enable EDNS0, either with the “edns0” option in /etc/resolv.conf, or using the RES_USE_EDNS0 or RES_USE_DNSSEC resolver flags. The underlying issue affects recursive resolvers such as BIND and Unbound as well, and has to be fixed separately there.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2018-04-10T00:00:00Z",
    "advisory" : "RHSA-2018:0805",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "glibc-0:2.17-222.el7"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Will not fix",
    "package_name" : "compat-glibc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Will not fix",
    "package_name" : "glibc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Will not fix",
    "package_name" : "compat-glibc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Will not fix",
    "package_name" : "glibc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Will not fix",
    "package_name" : "compat-glibc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2017-12132\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-12132" ],
  "name" : "CVE-2017-12132",
  "csaw" : false
}