RHEL 8 : Red Hat Single Sign-On 7.4.9 security update on RHEL 8 (Moderate) (RHSA-2021:3529)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2021:3529. The text
# itself is copyright (C) Red Hat, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(165157);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");

  script_cve_id(
    "CVE-2020-28491",
    "CVE-2020-35509",
    "CVE-2021-3513",
    "CVE-2021-3632",
    "CVE-2021-3637"
  );
  script_xref(name:"RHSA", value:"2021:3529");

  script_name(english:"RHEL 8 : Red Hat Single Sign-On 7.4.9 security update on RHEL 8 (Moderate) (RHSA-2021:3529)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for Red Hat Single Sign-On 7.4.9.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2021:3529 advisory.

    Red Hat Single Sign-On 7.4 is a standalone server, based on the Keycloak project, that provides
    authentication and standards-based single sign-on capabilities for web and mobile applications.

    This release of Red Hat Single Sign-On 7.4.9 serves as a replacement for Red Hat Single Sign-On 7.4.8, and
    includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the
    References.

    Security Fix(es):

    * jackson-dataformat-cbor:  Unchecked allocation of byte buffer can cause a java.lang.OutOfMemoryError
    exception (CVE-2020-28491)

    * keycloak: Brute force attack is possible even after the account lockout (CVE-2021-3513)

    * keycloak: Anyone can register a new device when there is no device registered for passwordless login
    (CVE-2021-3632)

    * keycloak-model-infinispan: authenticationSessions map in RootAuthenticationSessionEntity grows
    boundlessly could lead to a DoS attack (CVE-2021-3637)

    * keycloak: X509 Direct Grant Auth does not verify certificate timestamp validity (CVE-2020-35509)

    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 these issues but has instead relied only on the application's self-reported version
number.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2021/rhsa-2021_3529.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2b48ff8c");
  # https://access.redhat.com/documentation/en-us/red_hat_single_sign-on/7.4/html/release_notes/index
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?62a193bc");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#moderate");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2021:3529");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1912427");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1930423");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1953439");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1978196");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1979638");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL Red Hat Single Sign-On 7.4.9 package based on the guidance in RHSA-2021:3529.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/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-2021-3637");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-3632");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20, 287, 400, 522, 770);
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/02/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/09/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/09/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rh-sso7-keycloak");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rh-sso7-keycloak-server");
  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) 2022-2024 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: '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/layered/rhel8/x86_64/rh-sso/7.3/debug',
      'content/dist/layered/rhel8/x86_64/rh-sso/7.3/os',
      'content/dist/layered/rhel8/x86_64/rh-sso/7.3/source/SRPMS',
      'content/dist/layered/rhel8/x86_64/rh-sso/7.4/debug',
      'content/dist/layered/rhel8/x86_64/rh-sso/7.4/os',
      'content/dist/layered/rhel8/x86_64/rh-sso/7.4/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'rh-sso7-keycloak-9.0.15-1.redhat_00002.1.el8sso', 'release':'8', 'el_string':'el8sso', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'rh-sso'},
      {'reference':'rh-sso7-keycloak-server-9.0.15-1.redhat_00002.1.el8sso', 'release':'8', 'el_string':'el8sso', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'rh-sso'}
    ]
  }
];

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, 'rh-sso7-keycloak / rh-sso7-keycloak-server');
}