Amazon Linux 2 : ipa (ALAS-2024-2585)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALAS-2024-2585.
##

include('compat.inc');

if (description)
{
  script_id(202238);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/12/11");

  script_cve_id("CVE-2024-3183");

  script_name(english:"Amazon Linux 2 : ipa (ALAS-2024-2585)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by a vulnerability as referenced in the ALAS2-2024-2585 advisory.

    A vulnerability was found in FreeIPA in a way when a Kerberos TGS-REQ is encrypted using the client's
    session key. This key is different for each new session, which protects it from brute force attacks.
    However, the ticket it contains is encrypted using the target principal key directly. For user principals,
    this key is a hash of a public per-principal randomly-generated salt and the user's password.If a
    principal is compromised it means the attacker would be able to retrieve tickets encrypted to any
    principal, all of them being encrypted by their own key directly. By taking these tickets and salts
    offline, the attacker could run brute force attacks to find character strings able to decrypt tickets when
    combined to a principal salt (i.e. find the principal's password). (CVE-2024-3183)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/AL2/ALAS-2024-2585.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-3183.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update ipa' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-3183");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/06/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/07/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/07/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-client-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-python-compat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-server-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-server-dns");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ipa-server-trust-ad");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python2-ipaclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python2-ipalib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python2-ipaserver");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "2")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'ipa-client-4.6.8-5.amzn2.17.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-client-4.6.8-5.amzn2.17.1', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-client-4.6.8-5.amzn2.17.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-client-common-4.6.8-5.amzn2.17.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-common-4.6.8-5.amzn2.17.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-debuginfo-4.6.8-5.amzn2.17.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-debuginfo-4.6.8-5.amzn2.17.1', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-debuginfo-4.6.8-5.amzn2.17.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-python-compat-4.6.8-5.amzn2.17.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-4.6.8-5.amzn2.17.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-4.6.8-5.amzn2.17.1', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-4.6.8-5.amzn2.17.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-common-4.6.8-5.amzn2.17.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-dns-4.6.8-5.amzn2.17.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-trust-ad-4.6.8-5.amzn2.17.1', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-trust-ad-4.6.8-5.amzn2.17.1', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'ipa-server-trust-ad-4.6.8-5.amzn2.17.1', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python2-ipaclient-4.6.8-5.amzn2.17.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python2-ipalib-4.6.8-5.amzn2.17.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python2-ipaserver-4.6.8-5.amzn2.17.1', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach var package_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(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (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)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ipa-client / ipa-client-common / ipa-common / etc");
}