{
  "threat_severity" : "Important",
  "public_date" : "2017-11-24T00:00:00Z",
  "bugzilla" : {
    "description" : "Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation",
    "id" : "1517220",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1517220"
  },
  "cvss" : {
    "cvss_base_score" : "6.2",
    "cvss_scoring_vector" : "AV:L/AC:H/Au:N/C:C/I:C/A:C",
    "status" : "verified"
  },
  "cvss3" : {
    "cvss3_base_score" : "8.1",
    "cvss3_scoring_vector" : "CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-416",
  "details" : [ "The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.", "The Linux kernel is vulerable to a use-after-free flaw when Transformation User configuration interface(CONFIG_XFRM_USER) compile-time configuration were enabled. This vulnerability occurs while closing a xfrm netlink socket in xfrm_dump_policy_done. A user/process could  abuse this flaw to potentially escalate their privileges on a system." ],
  "statement" : "This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.\nThis issue affects the version of the kernel package as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2 may address this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2018-05-08T00:00:00Z",
    "advisory" : "RHSA-2018:1355",
    "cpe" : "cpe:/a:redhat:rhel_extras_rt:7",
    "package" : "kernel-rt-0:3.10.0-862.2.3.rt56.806.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2018-04-10T00:00:00Z",
    "advisory" : "RHSA-2018:0654",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "kernel-alt-0:4.14.0-49.el7a"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2018-05-08T00:00:00Z",
    "advisory" : "RHSA-2018:1318",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "kernel-0:3.10.0-862.2.3.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.4 Extended Update Support",
    "release_date" : "2019-05-14T00:00:00Z",
    "advisory" : "RHSA-2019:1170",
    "cpe" : "cpe:/o:redhat:rhel_eus:7.4",
    "package" : "kernel-0:3.10.0-693.47.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise MRG 2",
    "release_date" : "2019-05-14T00:00:00Z",
    "advisory" : "RHSA-2019:1190",
    "cpe" : "cpe:/a:redhat:enterprise_mrg:2:server:el6",
    "package" : "kernel-rt-1:3.10.0-693.47.2.rt56.641.el6rt"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2017-16939\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-16939" ],
  "name" : "CVE-2017-16939",
  "csaw" : false
}