{
  "threat_severity" : "Moderate",
  "public_date" : "2013-11-26T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: xen: hypercalls exposed to privilege rings 1 and 2 of HVM guests",
    "id" : "1029111",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1029111"
  },
  "cvss" : {
    "cvss_base_score" : "6.0",
    "cvss_scoring_vector" : "AV:L/AC:H/Au:S/C:C/I:C/A:C",
    "status" : "verified"
  },
  "details" : [ "Xen 3.0.3 through 4.1.x (possibly 4.1.6.1), 4.2.x (possibly 4.2.3), and 4.3.x (possibly 4.3.1) does not properly prevent access to hypercalls, which allows local guest users to gain privileges via a crafted application running in ring 1 or 2." ],
  "statement" : "This issue did affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5, however please note that none of the guest operating system supported in Red Hat Enterprise Linux 5 are using the vulnerable set of rings of protection for privilege separation.\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 project for reporting this issue. Upstream acknowledges Jan Beulich as the original reporter.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "release_date" : "2014-03-12T00:00:00Z",
    "advisory" : "RHSA-2014:0285",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5",
    "package" : "kernel-0:2.6.18-371.6.1.el5"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2013-4554\nhttps://nvd.nist.gov/vuln/detail/CVE-2013-4554" ],
  "name" : "CVE-2013-4554",
  "csaw" : false
}