{
  "threat_severity" : "Low",
  "public_date" : "2019-07-15T00:00:00Z",
  "bugzilla" : {
    "description" : "Kernel: net: weak IP ID generation leads to remote device tracking",
    "id" : "1729931",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1729931"
  },
  "cvss3" : {
    "cvss3_base_score" : "3.7",
    "cvss3_scoring_vector" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-331->CWE-200",
  "details" : [ "In the Linux kernel before 5.1.7, a device can be tracked by an attacker using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). An attack may be conducted by hosting a crafted web page that uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP addresses.", "A flaw was found in the way the Linux kernel derived the IP ID field from a partial kernel space address returned by a net_hash_mix() function. A remote user could observe a weak IP ID generation in this field to track Linux devices." ],
  "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 Linux kernel as shipped with Red Hat Enterprise Linux 7,  8 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 7, 8 and Red Hat Enterprise MRG 2 may address this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2020-03-31T00:00:00Z",
    "advisory" : "RHSA-2020:1070",
    "cpe" : "cpe:/a:redhat:rhel_extras_rt:7",
    "package" : "kernel-rt-0:3.10.0-1127.rt56.1093.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2020-03-31T00:00:00Z",
    "advisory" : "RHSA-2020:1016",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "kernel-0:3.10.0-1127.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2019-11-05T00:00:00Z",
    "advisory" : "RHSA-2019:3309",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-147.rt24.93.el8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2019-11-05T00:00:00Z",
    "advisory" : "RHSA-2019:3517",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-147.el8"
  } ],
  "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"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-alt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise MRG 2",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/a:redhat:enterprise_mrg:2"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2019-10638\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-10638\nhttps://arxiv.org/pdf/1906.10478.pdf" ],
  "name" : "CVE-2019-10638",
  "csaw" : false
}