RHEL 7 : qemu-kvm-rhev (RHSA-2018:1369)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:1369. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(109755);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");

  script_cve_id("CVE-2018-7550", "CVE-2018-7858");
  script_xref(name:"RHSA", value:"2018:1369");

  script_name(english:"RHEL 7 : qemu-kvm-rhev (RHSA-2018:1369)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for qemu-kvm-rhev.");
  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-2018:1369 advisory.

    KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of
    architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines
    that use KVM in environments managed by Red Hat products.

    Security Fix(es):

    * QEMU: i386: multiboot OOB access while loading kernel image (CVE-2018-7550)

    * QEMU: cirrus: OOB access when updating VGA display (CVE-2018-7858)

    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 Cyrille Chatras (Orange.com) and CERT-CC (Orange.com) for reporting
    CVE-2018-7550 and Ross Lagerwall (Citrix.com) for reporting CVE-2018-7858.

    Bug Fix(es):

    * In certain Red Hat Virtualization (RHV) guest configurations, virtual pass-through devices could not be
    removed properly. A reference count leak in the QEMU emulator has been removed, and the affected devices
    are now removed reliably. (BZ#1555213)

    * Previously, a raw disk image that was using the --preallocation=full option in some cases could not be
    resized. This problem has been fixed and no longer occurs. (BZ#1566587)

    * Due to race conditions in the virtio-blk and virtio-scsi services, the QEMU emulator sometimes
    terminated unexpectedly when shutting down. The race conditions have been removed, and QEMU now exits
    gracefully. (BZ#1566586)

    * Prior to this update, deleting guest snapshots using the RHV GUI in some cases failed due to an
    incorrect image-seeking algorithm. This update fixes the underlying code, and guest snapshots in RHV can
    now be deleted successfully. (BZ#1566369)

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_1369.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?69f33dc9");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2018:1369");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#moderate");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1549798");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1553402");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1555213");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1566369");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1566586");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1566587");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL qemu-kvm-rhev package based on the guidance in RHSA-2018:1369.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-7550");
  script_cwe_id(125, 787);
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/05/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-img-rhev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-common-rhev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-rhev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-tools-rhev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  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("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-alt/server/7/7Server/power9/ppc64le/rhv-mgmt-agent/4/debug',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/rhv-mgmt-agent/4/os',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/rhv-mgmt-agent/4/source/SRPMS',
      'content/dist/rhel/power-le/7/7.3/ppc64le/rhev-mgmt-agent/3/debug',
      'content/dist/rhel/power-le/7/7.3/ppc64le/rhev-mgmt-agent/3/os',
      'content/dist/rhel/power-le/7/7.3/ppc64le/rhev-mgmt-agent/3/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhev-mgmt-agent/3/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhev-mgmt-agent/3/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhev-mgmt-agent/3/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhev-tools/3/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhev-tools/3/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhev-tools/3/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhv-mgmt-agent/4/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhv-mgmt-agent/4/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhv-mgmt-agent/4/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhv-tools/4/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhv-tools/4/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/rhv-tools/4/source/SRPMS',
      'content/dist/rhel/power/7/7Server/ppc64/rhev-tools/3/debug',
      'content/dist/rhel/power/7/7Server/ppc64/rhev-tools/3/os',
      'content/dist/rhel/power/7/7Server/ppc64/rhev-tools/3/source/SRPMS',
      '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':'qemu-img-rhev-2.10.0-21.el7_5.2', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7_5', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'ovirt-'},
      {'reference':'qemu-img-rhev-2.10.0-21.el7_5.2', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_5', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'ovirt-'},
      {'reference':'qemu-kvm-common-rhev-2.10.0-21.el7_5.2', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7_5', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'ovirt-'},
      {'reference':'qemu-kvm-common-rhev-2.10.0-21.el7_5.2', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_5', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'ovirt-'},
      {'reference':'qemu-kvm-rhev-2.10.0-21.el7_5.2', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7_5', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'ovirt-'},
      {'reference':'qemu-kvm-rhev-2.10.0-21.el7_5.2', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_5', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'ovirt-'},
      {'reference':'qemu-kvm-tools-rhev-2.10.0-21.el7_5.2', 'cpu':'ppc64le', 'release':'7', 'el_string':'el7_5', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'ovirt-'},
      {'reference':'qemu-kvm-tools-rhev-2.10.0-21.el7_5.2', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_5', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', '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_WARNING,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'qemu-img-rhev / qemu-kvm-common-rhev / qemu-kvm-rhev / etc');
}