RHEL 6 : kernel-rt (RHSA-2018:1170)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:1170. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(109335);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");

  script_cve_id(
    "CVE-2017-1000410",
    "CVE-2017-13166",
    "CVE-2017-15265",
    "CVE-2017-17449",
    "CVE-2017-18017",
    "CVE-2017-8824",
    "CVE-2017-9725"
  );
  script_xref(name:"RHSA", value:"2018:1170");

  script_name(english:"RHEL 6 : kernel-rt (RHSA-2018:1170)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for kernel-rt.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2018:1170 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with
    extremely high determinism requirements.

    Security Fix(es):

    * kernel: Use-after-free vulnerability in DCCP socket (CVE-2017-8824, Important)

    * kernel: v4l2: disabled memory access protection mechanism allowing privilege escalation (CVE-2017-13166,
    Important)

    * kernel: Incorrect type conversion for size during dma allocation (CVE-2017-9725, Moderate)

    * kernel: Use-after-free in snd_seq_ioctl_create_port() (CVE-2017-15265, Moderate)

    * kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe
    systemwide activity (CVE-2017-17449, Moderate)

    * kernel: netfilter: use-after-free in tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c
    (CVE-2017-18017, Moderate)

    * kernel: Stack information leak in the EFS element (CVE-2017-1000410, Moderate)

    For more details about the security issue(s), including the impact, a CVSS score, and other related
    information, refer to the CVE page(s) listed in the References section.

    Red Hat would like to thank Mohamed Ghannam for reporting CVE-2017-8824 and Armis Labs for reporting
    CVE-2017-1000410.

    Bug Fix(es):

    * The kernel-rt packages have been upgraded to version 3.10.0-693.25.2.rt56.612, which provides a number
    of security and bug fixes over the previous version. (BZ#1549731)

    * Intel Core X-Series (Skylake) processors use a hardcoded Time Stamp Counter (TSC) frequency of 25 MHz.
    In some cases this can be imprecise and lead to timing-related problems such as time drift, timers being
    triggered early, or TSC clock instability. This update mitigates these problems by no longer using the
    native_calibrate_tsc() function to define the TSC frequency. Refined calibration is now used to update
    the clock rate accordingly in these cases. (BZ#1547854)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2018/rhsa-2018_1170.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?14c9c330");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2018:1170");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1489088");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1501878");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1519160");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1519591");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1525762");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1531135");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1547854");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1548412");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1549731");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kernel-rt package based on the guidance in RHSA-2018:1170.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-18017");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(119, 200, 266, 284, 416, 681);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-firmware");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-vanilla");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-vanilla-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2018-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl", "redhat_repos.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm.inc');
include('rhel.inc');
include('ksplice.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '6')) audit(AUDIT_OS_NOT, 'Red Hat 6.x', 'Red Hat ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  var cve_list = make_list('CVE-2017-8824', 'CVE-2017-9725', 'CVE-2017-13166', 'CVE-2017-15265', 'CVE-2017-17449', 'CVE-2017-18017', 'CVE-2017-1000410');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2018:1170');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var constraints = [
  {
    'repo_relative_urls': [
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g-execute/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g-execute/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g-execute/2/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-g/2/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-m/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-m/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-m/2/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-mgmt/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-mgmt/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-mgmt/2/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-r/2/debug',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-r/2/os',
      'content/dist/rhel/server/6/6Server/x86_64/mrg-r/2/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'kernel-rt-3.10.0-693.25.2.rt56.612.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-debug-3.10.0-693.25.2.rt56.612.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-debug-devel-3.10.0-693.25.2.rt56.612.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-devel-3.10.0-693.25.2.rt56.612.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-doc-3.10.0-693.25.2.rt56.612.el6rt', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-firmware-3.10.0-693.25.2.rt56.612.el6rt', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-trace-3.10.0-693.25.2.rt56.612.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-trace-devel-3.10.0-693.25.2.rt56.612.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-vanilla-3.10.0-693.25.2.rt56.612.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'},
      {'reference':'kernel-rt-vanilla-devel-3.10.0-693.25.2.rt56.612.el6rt', 'cpu':'x86_64', 'release':'6', 'el_string':'el6rt', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1', 'exists_check':'mrg-release'}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
  foreach var pkg ( constraint_array['pkgs'] ) {
    var reference = NULL;
    var _release = NULL;
    var sp = NULL;
    var _cpu = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var epoch = NULL;
    var allowmaj = NULL;
    var exists_check = NULL;
    var cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        _release &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || rpm_exists(release:_release, rpm:exists_check))) &&
        rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kernel-rt / kernel-rt-debug / kernel-rt-debug-devel / etc');
}