RHEL 7 : Red Hat Virtualization (RHSA-2018:1820)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:1820. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(110467);
  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");

  script_cve_id("CVE-2018-1124", "CVE-2018-1126");
  script_xref(name:"RHSA", value:"2018:1820");
  script_xref(name:"IAVA", value:"2018-A-0174-S");

  script_name(english:"RHEL 7 : Red Hat Virtualization (RHSA-2018:1820)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2018:1820 advisory.

    The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include
    redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH)
    are installed using a special build of Red Hat Enterprise Linux with only the packages required to host
    virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and
    performing administrative tasks.

    Security Fix(es):

    * procps-ng, procps: Integer overflows leading to heap overflow in file2strvec (CVE-2018-1124)

    * procps-ng, procps: incorrect integer size in proc/alloc.* leading to truncation / integer overflow
    issues (CVE-2018-1126)

    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 Qualys Research Labs for reporting these issues.

    Bug Fix(es):

    * Previously some SELinux %post scripts were not re-executed because imgbased attempts to re-execute RPM
    %post scripts which involve SELinux commands inside a namespace, and some commands failed due to SELinux
    namespacing rules.

    This update ensures that SELinux contexts inside imgbased update namespaces now update appropriately, and
    the scripts are re-executed by remounting /sys and /sys/fs/selinux inside the update namespace.
    (BZ#1571607)

    * Previously, vmcore files that were created by kdump were not relabelled by kdumpctl after a reboot. As a
    result, Rsync returned an error when trying to remove the security.selinux attribute while syncing
    unlabelled files, as this is forbidden by selinux.

    In this release, restorecon is run on the source directory before syncing it, which enables the files to
    be synchronized with the correct labels. (BZ#1579141)

    Enhancement(s):

    * Previously, imgbased filtered out stderr from LVM commands to improve parsing reliability. In this
    release, imgbased now logs stderr from LVM commands in order to provide this information in the imgbased
    logs, for example during an upgrade failure. (BZ#1574187)

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_1820.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?09d9de30");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2018:1820");
  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=1571607");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1573334");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1574187");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1575465");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1575853");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1575922");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1579141");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1582433");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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-2018-1126");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(122, 190);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/05/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/06/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:imgbased");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-imgbased");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:redhat-release-virtualization-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:redhat-virtualization-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:redhat-virtualization-host-image-update");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:redhat-virtualization-host-image-update-placeholder");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"II");
  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("redhat_repos.nasl", "ssh_get_info.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');

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: '7')) audit(AUDIT_OS_NOT, 'Red Hat 7.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);

var constraints = [
  {
    'repo_relative_urls': [
      'content/dist/rhel/server/7/7.3/x86_64/rhev-mgmt-agent/3/debug',
      'content/dist/rhel/server/7/7.3/x86_64/rhev-mgmt-agent/3/os',
      'content/dist/rhel/server/7/7.3/x86_64/rhev-mgmt-agent/3/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhev-mgmt-agent/3/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhev-mgmt-agent/3/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhev-mgmt-agent/3/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhevh/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhevh/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhevh/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-manager-tools/4/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-manager-tools/4/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-manager-tools/4/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-mgmt-agent/4.3/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-mgmt-agent/4.3/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-mgmt-agent/4.3/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-mgmt-agent/4/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-mgmt-agent/4/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-mgmt-agent/4/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-tools/4/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-tools/4/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhv-tools/4/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh-build/4.3/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh-build/4.3/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh-build/4.3/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh-build/4/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh-build/4/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh-build/4/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh/4.3/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh/4.3/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh/4.3/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh/4/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh/4/os',
      'content/dist/rhel/server/7/7Server/x86_64/rhvh/4/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'imgbased-1.0.17-0.1.el7ev', 'release':'7', 'el_string':'el7ev', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ovirt-'},
      {'reference':'python-imgbased-1.0.17-0.1.el7ev', 'release':'7', 'el_string':'el7ev', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ovirt-'},
      {'reference':'redhat-release-virtualization-host-4.2-3.1.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ovirt-'},
      {'reference':'redhat-virtualization-host-image-update-4.2-20180531.0.el7_5', 'release':'7', 'el_string':'el7_5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ovirt-'},
      {'reference':'redhat-virtualization-host-image-update-placeholder-4.2-3.1.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'ovirt-'}
    ]
  }
];

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, 'imgbased / python-imgbased / redhat-release-virtualization-host / etc');
}