RHEL 8 : sssd (RHSA-2019:3651)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:3651. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
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  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/28");

  script_cve_id("CVE-2018-16838");
  script_xref(name:"RHSA", value:"2019:3651");

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  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in
the RHSA-2019:3651 advisory.

  - sssd: improper implementation of GPOs due to too restrictive permissions (CVE-2018-16838)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1677994");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1681279");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1686154");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1687281");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1695582");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1702658");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1711318");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1712875");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1725168");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1726945");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1729055");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1733372");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1736265");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1736483");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1736796");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1736861");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N");
  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:U/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-16838");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(269);
  script_set_attribute(attribute:"vendor_severity", value:"Low");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/11/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsss_autofs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsss_certmap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsss_idmap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsss_nss_idmap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsss_nss_idmap-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsss_simpleifp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsss_sudo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python3-libipa_hbac");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python3-libsss_nss_idmap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python3-sss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python3-sss-murmur");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python3-sssdconfig");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-ad");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-common-pac");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-dbus");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-ipa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-kcm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-krb5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-krb5-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-libwbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-nfs-idmap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-polkit-rules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-proxy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:sssd-winbind-idmap");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
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  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: '8')) audit(AUDIT_OS_NOT, 'Red Hat 8.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/rhel8/8.10/aarch64/baseos/debug',
      'content/dist/rhel8/8.10/aarch64/baseos/os',
      'content/dist/rhel8/8.10/aarch64/baseos/source/SRPMS',
      'content/dist/rhel8/8.10/aarch64/codeready-builder/debug',
      'content/dist/rhel8/8.10/aarch64/codeready-builder/os',
      'content/dist/rhel8/8.10/aarch64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.10/ppc64le/baseos/debug',
      'content/dist/rhel8/8.10/ppc64le/baseos/os',
      'content/dist/rhel8/8.10/ppc64le/baseos/source/SRPMS',
      'content/dist/rhel8/8.10/ppc64le/codeready-builder/debug',
      'content/dist/rhel8/8.10/ppc64le/codeready-builder/os',
      'content/dist/rhel8/8.10/ppc64le/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.10/x86_64/baseos/debug',
      'content/dist/rhel8/8.10/x86_64/baseos/os',
      'content/dist/rhel8/8.10/x86_64/baseos/source/SRPMS',
      'content/dist/rhel8/8.10/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8.10/x86_64/codeready-builder/os',
      'content/dist/rhel8/8.10/x86_64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.6/aarch64/baseos/debug',
      'content/dist/rhel8/8.6/aarch64/baseos/os',
      'content/dist/rhel8/8.6/aarch64/baseos/source/SRPMS',
      'content/dist/rhel8/8.6/aarch64/codeready-builder/debug',
      'content/dist/rhel8/8.6/aarch64/codeready-builder/os',
      'content/dist/rhel8/8.6/aarch64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.6/ppc64le/baseos/debug',
      'content/dist/rhel8/8.6/ppc64le/baseos/os',
      'content/dist/rhel8/8.6/ppc64le/baseos/source/SRPMS',
      'content/dist/rhel8/8.6/ppc64le/codeready-builder/debug',
      'content/dist/rhel8/8.6/ppc64le/codeready-builder/os',
      'content/dist/rhel8/8.6/ppc64le/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.6/x86_64/baseos/debug',
      'content/dist/rhel8/8.6/x86_64/baseos/os',
      'content/dist/rhel8/8.6/x86_64/baseos/source/SRPMS',
      'content/dist/rhel8/8.6/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8.6/x86_64/codeready-builder/os',
      'content/dist/rhel8/8.6/x86_64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.8/aarch64/baseos/debug',
      'content/dist/rhel8/8.8/aarch64/baseos/os',
      'content/dist/rhel8/8.8/aarch64/baseos/source/SRPMS',
      'content/dist/rhel8/8.8/aarch64/codeready-builder/debug',
      'content/dist/rhel8/8.8/aarch64/codeready-builder/os',
      'content/dist/rhel8/8.8/aarch64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.8/ppc64le/baseos/debug',
      'content/dist/rhel8/8.8/ppc64le/baseos/os',
      'content/dist/rhel8/8.8/ppc64le/baseos/source/SRPMS',
      'content/dist/rhel8/8.8/ppc64le/codeready-builder/debug',
      'content/dist/rhel8/8.8/ppc64le/codeready-builder/os',
      'content/dist/rhel8/8.8/ppc64le/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.8/x86_64/baseos/debug',
      'content/dist/rhel8/8.8/x86_64/baseos/os',
      'content/dist/rhel8/8.8/x86_64/baseos/source/SRPMS',
      'content/dist/rhel8/8.8/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8.8/x86_64/codeready-builder/os',
      'content/dist/rhel8/8.8/x86_64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.9/aarch64/baseos/debug',
      'content/dist/rhel8/8.9/aarch64/baseos/os',
      'content/dist/rhel8/8.9/aarch64/baseos/source/SRPMS',
      'content/dist/rhel8/8.9/aarch64/codeready-builder/debug',
      'content/dist/rhel8/8.9/aarch64/codeready-builder/os',
      'content/dist/rhel8/8.9/aarch64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.9/ppc64le/baseos/debug',
      'content/dist/rhel8/8.9/ppc64le/baseos/os',
      'content/dist/rhel8/8.9/ppc64le/baseos/source/SRPMS',
      'content/dist/rhel8/8.9/ppc64le/codeready-builder/debug',
      'content/dist/rhel8/8.9/ppc64le/codeready-builder/os',
      'content/dist/rhel8/8.9/ppc64le/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8.9/x86_64/baseos/debug',
      'content/dist/rhel8/8.9/x86_64/baseos/os',
      'content/dist/rhel8/8.9/x86_64/baseos/source/SRPMS',
      'content/dist/rhel8/8.9/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8.9/x86_64/codeready-builder/os',
      'content/dist/rhel8/8.9/x86_64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8/aarch64/baseos/debug',
      'content/dist/rhel8/8/aarch64/baseos/os',
      'content/dist/rhel8/8/aarch64/baseos/source/SRPMS',
      'content/dist/rhel8/8/aarch64/codeready-builder/debug',
      'content/dist/rhel8/8/aarch64/codeready-builder/os',
      'content/dist/rhel8/8/aarch64/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8/ppc64le/baseos/debug',
      'content/dist/rhel8/8/ppc64le/baseos/os',
      'content/dist/rhel8/8/ppc64le/baseos/source/SRPMS',
      'content/dist/rhel8/8/ppc64le/codeready-builder/debug',
      'content/dist/rhel8/8/ppc64le/codeready-builder/os',
      'content/dist/rhel8/8/ppc64le/codeready-builder/source/SRPMS',
      'content/dist/rhel8/8/x86_64/baseos/debug',
      'content/dist/rhel8/8/x86_64/baseos/os',
      'content/dist/rhel8/8/x86_64/baseos/source/SRPMS',
      'content/dist/rhel8/8/x86_64/codeready-builder/debug',
      'content/dist/rhel8/8/x86_64/codeready-builder/os',
      'content/dist/rhel8/8/x86_64/codeready-builder/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'libipa_hbac-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libsss_autofs-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libsss_certmap-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libsss_idmap-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libsss_nss_idmap-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libsss_nss_idmap-devel-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libsss_simpleifp-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libsss_sudo-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-libipa_hbac-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-libsss_nss_idmap-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-sss-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-sss-murmur-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python3-sssdconfig-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-ad-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-client-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-common-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-common-pac-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-dbus-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-ipa-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-kcm-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-krb5-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-krb5-common-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-ldap-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-libwbclient-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-nfs-idmap-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-polkit-rules-2.2.0-19.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-polkit-rules-2.2.0-19.el8', 'cpu':'ppc64le', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-polkit-rules-2.2.0-19.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-proxy-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-tools-2.2.0-19.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'sssd-winbind-idmap-2.2.0-19.el8', 'release':'8', '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 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, 'libipa_hbac / libsss_autofs / libsss_certmap / libsss_idmap / etc');
}