RHEL 6 : flash-plugin (RHSA-2019:1234)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:1234. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(125200);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/11/07");

  script_cve_id("CVE-2019-7837");
  script_xref(name:"RHSA", value:"2019:1234");

  script_name(english:"RHEL 6 : flash-plugin (RHSA-2019:1234)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update for flash-plugin.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 6 host has a package installed that is affected by a vulnerability as referenced in
the RHSA-2019:1234 advisory.

    The flash-plugin package contains a Mozilla Firefox compatible Adobe Flash Player web browser plug-in.

    This update upgrades Flash Player to version 32.0.0.192.

    Security Fix(es):

    * flash-plugin: Arbitrary Code Execution vulnerability (APSB19-26) (CVE-2019-7837)

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

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

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://security.access.redhat.com/data/csaf/v2/advisories/2019/rhsa-2019_1234.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c772ad30");
  script_set_attribute(attribute:"see_also", value:"https://helpx.adobe.com/security/products/flash-player/apsb19-26.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:1234");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#critical");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1710045");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL flash-plugin package based on the guidance in RHSA-2019:1234.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/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:N/UI:R/S:U/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-2019-7837");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"vendor_severity", value:"Critical");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/05/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:flash-plugin");
  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) 2019-2024 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: '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);

var constraints = [
  {
    'repo_relative_urls': [
      'content/dist/rhel/client/6/6Client/i386/supplementary/debug',
      'content/dist/rhel/client/6/6Client/i386/supplementary/os',
      'content/dist/rhel/client/6/6Client/i386/supplementary/source/SRPMS',
      'content/dist/rhel/client/6/6Client/x86_64/supplementary/debug',
      'content/dist/rhel/client/6/6Client/x86_64/supplementary/os',
      'content/dist/rhel/client/6/6Client/x86_64/supplementary/source/SRPMS',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/supplementary/debug',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/supplementary/os',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/supplementary/source/SRPMS',
      'content/dist/rhel/server/6/6Server/i386/supplementary/debug',
      'content/dist/rhel/server/6/6Server/i386/supplementary/os',
      'content/dist/rhel/server/6/6Server/i386/supplementary/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/supplementary/debug',
      'content/dist/rhel/server/6/6Server/x86_64/supplementary/os',
      'content/dist/rhel/server/6/6Server/x86_64/supplementary/source/SRPMS',
      'content/dist/rhel/workstation/6/6Workstation/i386/supplementary/debug',
      'content/dist/rhel/workstation/6/6Workstation/i386/supplementary/os',
      'content/dist/rhel/workstation/6/6Workstation/i386/supplementary/source/SRPMS',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/supplementary/debug',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/supplementary/os',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/supplementary/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'flash-plugin-32.0.0.192-1.el6_10', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

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 flash_plugin_caveat = '\n' +
    'NOTE: This vulnerability check only applies to RedHat released\n' +
    'versions of the flash-plugin package. This check does not apply to\n' +
    'Adobe released versions of the flash-plugin package, which are\n' +
    'versioned similarly and cause collisions in detection.\n\n' +

    'If you are certain you are running the Adobe released package of\n' +
    'flash-plugin and are running a version of it equal or higher to the\n' +
    'RedHat version listed above then you can consider this a false\n' +
    'positive.\n';
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat() + flash_plugin_caveat;
  else extra = rpm_report_get() + flash_plugin_caveat;
  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, 'flash-plugin');
}