{
  "threat_severity" : "Low",
  "public_date" : "2015-09-05T00:00:00Z",
  "bugzilla" : {
    "description" : "glibc: LD_POINTER_GUARD in the environment is not sanitized",
    "id" : "1260581",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1260581"
  },
  "cvss" : {
    "cvss_base_score" : "3.7",
    "cvss_scoring_vector" : "AV:L/AC:H/Au:N/C:P/I:P/A:P",
    "status" : "verified"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.0",
    "cvss3_scoring_vector" : "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "details" : [ "The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.", "It was found that the dynamic loader did not sanitize the LD_POINTER_GUARD environment variable. An attacker could use this flaw to bypass the pointer guarding protection on set-user-ID or set-group-ID programs to execute arbitrary code with the permissions of the user running the application." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2017-08-01T00:00:00Z",
    "advisory" : "RHSA-2017:1916",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "glibc-0:2.17-196.el7"
  } ],
  "package_state" : [ {
    "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" : "glibc",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2015-8777\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-8777" ],
  "name" : "CVE-2015-8777",
  "mitigation" : {
    "value" : "The glibc pointer guard is a post-exploitation mitigation mechanism.  As such, it is only relevant if there are exploitable security vulnerabilities in the system.  Therefore, applying available security updates to the system is a possible mitigation for this issue.\nIn typical deployments, environment variables can only be set by users with shell access.  Restricting shell access to trusted users is another possible mitigation.",
    "lang" : "en:us"
  },
  "csaw" : false
}