RHEL 7 : qemu-kvm-rhev (RHSA-2017:0331)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:0331. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(234393);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/04/15");

  script_cve_id("CVE-2017-2615", "CVE-2017-2620");
  script_xref(name:"RHSA", value:"2017:0331");

  script_name(english:"RHEL 7 : qemu-kvm-rhev (RHSA-2017:0331)");

  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-2017:0331 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):

    * Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-
    bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged
    user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute
    arbitrary code on the host with privileges of QEMU process on the host. (CVE-2017-2615)

    * Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-
    bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A
    privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute
    arbitrary code on host with privileges of the QEMU process. (CVE-2017-2620)

    Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang (360.cn Inc.) for reporting
    CVE-2017-2615.

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.");
  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=1418200");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1420484");
  # https://security.access.redhat.com/data/csaf/v2/advisories/2017/rhsa-2017_0331.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3169f66c");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2017:0331");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL qemu-kvm-rhev package based on the guidance in RHSA-2017:0331.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/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-2017-2620");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(787);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/02/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/04/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  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:"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) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.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');

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/client/7/7Client/x86_64/openstack-tools/7.0/debug',
      'content/dist/rhel/client/7/7Client/x86_64/openstack-tools/7.0/os',
      'content/dist/rhel/client/7/7Client/x86_64/openstack-tools/7.0/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/openstack-tools/7.0/debug',
      'content/dist/rhel/server/7/7Server/x86_64/openstack-tools/7.0/os',
      'content/dist/rhel/server/7/7Server/x86_64/openstack-tools/7.0/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/openstack/7.0/debug',
      'content/dist/rhel/server/7/7Server/x86_64/openstack/7.0/os',
      'content/dist/rhel/server/7/7Server/x86_64/openstack/7.0/source/SRPMS',
      'content/dist/rhel/workstation/7/7Workstation/x86_64/openstack-tools/7.0/debug',
      'content/dist/rhel/workstation/7/7Workstation/x86_64/openstack-tools/7.0/os',
      'content/dist/rhel/workstation/7/7Workstation/x86_64/openstack-tools/7.0/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'qemu-img-rhev-2.6.0-28.el7_3.6', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'openstack-'},
      {'reference':'qemu-kvm-common-rhev-2.6.0-28.el7_3.6', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'openstack-'},
      {'reference':'qemu-kvm-rhev-2.6.0-28.el7_3.6', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'openstack-'},
      {'reference':'qemu-kvm-tools-rhev-2.6.0-28.el7_3.6', 'cpu':'x86_64', 'release':'7', 'el_string':'el7_3', 'rpm_spec_vers_cmp':TRUE, 'epoch':'10', 'exists_check':'openstack-'}
    ]
  }
];

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, 'qemu-img-rhev / qemu-kvm-common-rhev / qemu-kvm-rhev / etc');
}