{
  "threat_severity" : "Important",
  "public_date" : "2013-04-18T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: xen: Xen PV DoS vulnerability with SYSENTER",
    "id" : "950668",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=950668"
  },
  "cvss" : {
    "cvss_base_score" : "5.7",
    "cvss_scoring_vector" : "AV:A/AC:M/Au:N/C:N/I:N/A:C",
    "status" : "draft"
  },
  "details" : [ "Xen 3.1 through 4.x, when running 64-bit hosts on Intel CPUs, does not clear the NT flag when using an IRET after a SYSENTER instruction, which allows PV guest users to cause a denial of service (hypervisor crash) by triggering a #GP fault, which is not properly handled by another IRET instruction." ],
  "statement" : "Not vulnerable.\nThis issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5 as we did not have support for sysenter for 64bit PV guests running on the Xen hypervisor (introduced in upstream changeset 16207:aeebd173c3fa).\nThis issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.",
  "acknowledgement" : "Red Hat would like to thank Xen for reporting this issue.",
  "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 5",
    "fix_state" : "Not affected",
    "package_name" : "kernel-xen",
    "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"
  }, {
    "product_name" : "Red Hat Enterprise MRG 2",
    "fix_state" : "Not affected",
    "package_name" : "realtime-kernel",
    "cpe" : "cpe:/a:redhat:enterprise_mrg:2"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2013-1917\nhttps://nvd.nist.gov/vuln/detail/CVE-2013-1917" ],
  "name" : "CVE-2013-1917",
  "csaw" : false
}