{
  "threat_severity" : "Moderate",
  "public_date" : "2019-09-02T00:00:00Z",
  "bugzilla" : {
    "description" : "gcc: POWER9 \"DARN\" RNG intrinsic produces repeated output",
    "id" : "1755523",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1755523"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-331",
  "details" : [ "The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same." ],
  "statement" : "As per upstream DARN (or power9) is not supported in GCC 6 or older, therefore versions of gcc shipped with Red Hat Enterprise Linux 5, 6 and 7 are not affected by this flaw.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2020-04-28T00:00:00Z",
    "advisory" : "RHSA-2020:1864",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "gcc-0:8.3.1-5.el8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2020-04-28T00:00:00Z",
    "advisory" : "RHSA-2020:1864",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "gcc-0:8.3.1-5.el8"
  }, {
    "product_name" : "Red Hat Software Collections for Red Hat Enterprise Linux 6",
    "release_date" : "2020-03-23T00:00:00Z",
    "advisory" : "RHSA-2020:0924",
    "cpe" : "cpe:/a:redhat:rhel_software_collections:3::el6",
    "package" : "devtoolset-8-gcc-0:8.3.1-3.2.el6"
  }, {
    "product_name" : "Red Hat Software Collections for Red Hat Enterprise Linux 7",
    "release_date" : "2020-03-23T00:00:00Z",
    "advisory" : "RHSA-2020:0924",
    "cpe" : "cpe:/a:redhat:rhel_software_collections:3::el7",
    "package" : "devtoolset-8-gcc-0:8.3.1-3.2.el7"
  }, {
    "product_name" : "Red Hat Software Collections for Red Hat Enterprise Linux 7",
    "release_date" : "2020-05-26T00:00:00Z",
    "advisory" : "RHSA-2020:2274",
    "cpe" : "cpe:/a:redhat:rhel_software_collections:3::el7",
    "package" : "devtoolset-9-gcc-0:9.3.1-2.el7"
  }, {
    "product_name" : "Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS",
    "release_date" : "2020-03-23T00:00:00Z",
    "advisory" : "RHSA-2020:0924",
    "cpe" : "cpe:/a:redhat:rhel_software_collections:3::el7",
    "package" : "devtoolset-8-gcc-0:8.3.1-3.2.el7"
  }, {
    "product_name" : "Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS",
    "release_date" : "2020-03-23T00:00:00Z",
    "advisory" : "RHSA-2020:0924",
    "cpe" : "cpe:/a:redhat:rhel_software_collections:3::el7",
    "package" : "devtoolset-8-gcc-0:8.3.1-3.2.el7"
  }, {
    "product_name" : "Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS",
    "release_date" : "2020-05-26T00:00:00Z",
    "advisory" : "RHSA-2020:2274",
    "cpe" : "cpe:/a:redhat:rhel_software_collections:3::el7",
    "package" : "devtoolset-9-gcc-0:9.3.1-2.el7"
  }, {
    "product_name" : "Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS",
    "release_date" : "2020-03-23T00:00:00Z",
    "advisory" : "RHSA-2020:0924",
    "cpe" : "cpe:/a:redhat:rhel_software_collections:3::el7",
    "package" : "devtoolset-8-gcc-0:8.3.1-3.2.el7"
  }, {
    "product_name" : "Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS",
    "release_date" : "2020-05-26T00:00:00Z",
    "advisory" : "RHSA-2020:2274",
    "cpe" : "cpe:/a:redhat:rhel_software_collections:3::el7",
    "package" : "devtoolset-9-gcc-0:9.3.1-2.el7"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "gcc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "gcc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "gcc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "mingw-gcc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2019-15847\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-15847\nhttps://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481" ],
  "name" : "CVE-2019-15847",
  "csaw" : false
}